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: / var / softaculous / mt /
Filename : mt.js
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// The cookie name to use for storing the blog-side comment session cookie.
var mtCookieName = "mt_blog_user";
var mtCookieDomain = ".[[domhost]]";
var mtCookiePath = "/";
var mtCookieTimeout = 14400;


function mtHide(id) {
    var el = (typeof id == "string") ? document.getElementById(id) : id;
    if (el) el.style.display = 'none';
}


function mtShow(id) {
    var el = (typeof id == "string") ? document.getElementById(id) : id;
    if (el) el.style.display = 'block';
}


function mtAttachEvent(eventName,func) {
    var onEventName = 'on' + eventName;
    var old = window[onEventName];
    if( typeof old != 'function' )
        window[onEventName] = func;
    else {
        window[onEventName] = function( evt ) {
            old( evt );
            return func( evt );
        };
    }
}


function mtFireEvent(eventName,param) {
    var fn = window['on' + eventName];
    if (typeof fn == 'function') return fn(param);
    return;
}

if(!this.JSON){JSON={};}(function(){function f(n){return n<10?'0'+n:n;}if(typeof Date.prototype.toJSON!=='function'){Date.prototype.toJSON=function(key){return this.getUTCFullYear()+'-'+f(this.getUTCMonth()+1)+'-'+f(this.getUTCDate())+'T'+f(this.getUTCHours())+':'+f(this.getUTCMinutes())+':'+f(this.getUTCSeconds())+'Z';};String.prototype.toJSON=Number.prototype.toJSON=Boolean.prototype.toJSON=function(key){return this.valueOf();};}var cx=/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,escapable=/[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,gap,indent,meta={'\b':'\\b','\t':'\\t','\n':'\\n','\f':'\\f','\r':'\\r','"':'\\"','\\':'\\\\'},rep;function quote(string){escapable.lastIndex=0;return escapable.test(string)?'"'+string.replace(escapable,function(a){var c=meta[a];return typeof c==='string'?c:'\\u'+('0000'+a.charCodeAt(0).toString(16)).slice(-4);})+'"':'"'+string+'"';}function str(key,holder){var i,k,v,length,mind=gap,partial,value=holder[key];if(value&&typeof value==='object'&&typeof value.toJSON==='function'){value=value.toJSON(key);}if(typeof rep==='function'){value=rep.call(holder,key,value);}switch(typeof value){case'string':return quote(value);case'number':return isFinite(value)?String(value):'null';case'boolean':case'null':return String(value);case'object':if(!value){return'null';}gap+=indent;partial=[];if(Object.prototype.toString.apply(value)==='[object Array]'){length=value.length;for(i=0;i<length;i+=1){partial[i]=str(i,value)||'null';}v=partial.length===0?'[]':gap?'[\n'+gap+partial.join(',\n'+gap)+'\n'+mind+']':'['+partial.join(',')+']';gap=mind;return v;}if(rep&&typeof rep==='object'){length=rep.length;for(i=0;i<length;i+=1){k=rep[i];if(typeof k==='string'){v=str(k,value);if(v){partial.push(quote(k)+(gap?': ':':')+v);}}}}else{for(k in value){if(Object.hasOwnProperty.call(value,k)){v=str(k,value);if(v){partial.push(quote(k)+(gap?': ':':')+v);}}}}v=partial.length===0?'{}':gap?'{\n'+gap+partial.join(',\n'+gap)+'\n'+mind+'}':'{'+partial.join(',')+'}';gap=mind;return v;}}if(typeof JSON.stringify!=='function'){JSON.stringify=function(value,replacer,space){var i;gap='';indent='';if(typeof space==='number'){for(i=0;i<space;i+=1){indent+=' ';}}else if(typeof space==='string'){indent=space;}rep=replacer;if(replacer&&typeof replacer!=='function'&&(typeof replacer!=='object'||typeof replacer.length!=='number')){throw new Error('JSON.stringify');}return str('',{'':value});};}if(typeof JSON.parse!=='function'){JSON.parse=function(text,reviver){var j;function walk(holder,key){var k,v,value=holder[key];if(value&&typeof value==='object'){for(k in value){if(Object.hasOwnProperty.call(value,k)){v=walk(value,k);if(v!==undefined){value[k]=v;}else{delete value[k];}}}}return reviver.call(holder,key,value);}cx.lastIndex=0;if(cx.test(text)){text=text.replace(cx,function(a){return'\\u'+('0000'+a.charCodeAt(0).toString(16)).slice(-4);});}if(/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,'@').replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,']').replace(/(?:^|:|,)(?:\s*\[)+/g,''))){j=eval('('+text+')');return typeof reviver==='function'?walk({'':j},''):j;}throw new SyntaxError('JSON.parse');};}}());

var MT = window.MT || {};

MT.cons = function () {
  return {
    LOG : 'log',
    WARN : 'warn',
    DEBUG : 'debug',
    INFO : 'info',
    ERR : 'error',
    JSON : 'json'
  };
}();


MT.core = function (o) {
  var _debug = false;
  
  return {
    
    connect : function (url,respType,respHandler) {
      var xh = mtGetXmlHttp();
      if (!xh) return false;
      
      xh.onreadystatechange = function() {
        if ( xh.readyState == 4 ) {
          if ( xh.status && ( xh.status != 200 ) ) {
            // error - ignore
          } else {
            switch (respType) {
              case 'json':
                respHandler(JSON.parse(xh.responseText));
                break;
                
              case 'xml':
                break;
                
              case 'text':
                break;
            }
          }
        }
      };
      
      xh.open('GET',url);
      xh.send(null);
    },
    
    getEl : function (el) {
      return MT.util.checkNodeType(el)==='element' ? id : (document.getElementById(el) || false);
    },
    
    addEvent : function (el,type,func,obj) {
      if(!obj && document.addEventListener) {
        el.addEventListener(type,func,false);
      } else if(obj && document.addEventListener) {
        el.addEventListener(type,function () {
          func.call(obj,event);
        },false);
      } else {
        if(obj) {
          el.attachEvent('on' + type,function () {
            func.call(obj,event);
          });
        } else {
          el.attachEvent('on' + type,function () {          
            func.call(el,event);
          });
        }
      }
    },
    
    
    log : function (level,msg) {
      if(_debug && window.console) {
        switch(level) {
          case 'warn':
          case 'debug':
          case 'info':
          case 'error':
          case 'log':
            console[level](msg);
            break;
            
          default:
            return false; 
        }
      } else {
        return false;
      }
    }
  }
}();


MT.util = function () {
  return {
    toggleVisibility : {
      show : function () {
        var i = arguments.length;
        
        while(i--) {
          if(MT.util.checkNodeType(arguments[i])==='element') {
            arguments[i].style.visibility = 'visible';
          } else {
            MT.core.getEl(arguments[i]).style.visibility = 'visible';
          }
        }
      },
      
      hide : function () {
        var i = arguments.length;
        while(i--) {
          if(MT.util.checkNodeType(arguments[i])==='element') {
            arguments[i].style.visibility = 'hidden';
          } else {
            MT.core.getEl(arguments[i]).style.visibility = 'hidden';
          }
        }
      }
    },
    
    toggleDisplay : {
      show : function () {
        var i = arguments.length;
        while(i--) {
          if(MT.util.checkNodeType(arguments[i])==='element') {
            arguments[i].style.display = '';
          } else {
            MT.core.getEl(arguments[i]).style.display = '';
          }
        }
      },
      
      hide : function () {
        var i = arguments.length;
        while(i--) {
          if(MT.util.checkNodeType(arguments[i])==='element') {
            arguments[i].style.display = 'none';
          } else {
            MT.core.getEl(arguments[i]).style.display = 'none';
          }
        }
      }
    },
    
    
    findDefiningParent : function (origin) {
      if(MT.util.checkNodeType(origin)==='element') {
        for(var node=origin.parentNode;node.parentNode;node=node.parentNode) {
          if((node.hasAttribute && node.hasAttribute('id')) || node.getAttribute('id')) {
            return node;
          }
        }
      }
      return false;
    },
    
    
    checkNodeType : function (obj) {
      if (obj && obj.nodeName){
        switch (obj.nodeType) {
          case 1: return 'element';
          case 3: return (/\S/).test(obj.nodeValue) ? 'textnode' : 'whitespace';
        }
      }
    }
  }
}();


(function () {
  var M = MT.core,
      c = MT.cons,
      u = MT.util,
      cache,
      isLoading,
      direction,
      currentComments,
      commentAnchor,
      commentArrId,
      commentsPerPage,
      commentsTotalPages,
      loadingIcon,
      pageNum,
      commentsOffset,
      totalComments,
      entryID,
      commentContentDiv,
      topNav,
      nav,
      currentCommentsSpan,
      topCurrentCommentsSpan;
            
  M.addEvent(window,'load',_init);
  
  /**
   * Initializes the class
   * 
   * @return void
   */
  function _init () {
    if(!MT.entryCommentCount) {
      return;
    }
    
    _initializeVariables();
    _setCommentOffset(false);
    _checkForAnchor();
		_setCurrentComments();
    _toggleNavLinks();
    _initializeEvents();
  }
  
  
  function _initializeVariables() {
    cache = {};
    isLoading = false;
    commentAnchor = '';
    commentArrId = '';
    commentsPerPage = MT.commentsPerPage || 50;
    currentComments = '';
    direction = 'ascend';
    entryID = MT.entryID;
    totalComments = MT.entryCommentCount;
    commentsTotalPages = Math.ceil(totalComments / commentsPerPage);
    pageNum = 1;
    
    loadingIcon = "<img title='Loading...' src='[[wwwurl]]/mt-static/images/indicator.white.gif' alt='Loading' />";
    
    commentContentDiv = M.getEl("comments-content");
    topNav = M.getEl("top-comment-nav");
    nav = M.getEl("comment-nav");
    
    currentCommentsSpan = M.getEl("current-comments");
    topCurrentCommentsSpan = M.getEl("top-current-comments");
  }
  
  function _initializeEvents() {
    if (commentsPerPage < totalComments) {
      M.addEvent(nav,'click',_handleEvents);
      M.addEvent(topNav,'click',_handleEvents);
    }
  }
  
  
  function _checkForAnchor() {
    var found = String(window.location.hash).match( /comment-(\d{1,6})/ );
		
		if (found) {
		  M.log(c.DEBUG,found);
			if (!Object.prototype.hasOwnProperty.call(M.getEl(found[0]), 'className')) {
				if (_findIdMatch(found[1])) {
    			pageNum = Math.floor(commentArrId / commentsPerPage) + 1;
    			M.log(c.DEBUG,'Comment Array Id: ' + commentArrId);
    			M.log(c.DEBUG,'Comments Per Page: ' + commentsPerPage);
    			M.log(c.DEBUG,'Page Number: ' + pageNum);
    			M.log(c.DEBUG,'Comment Offset: ' + _getCommentOffset());
    			_updateComments();
    		}
			}
		}
  }
  
  
  function _setCommentOffset() {
    commentsOffset = commentsPerPage * (pageNum-1);
  }
  
  
  function _getCommentOffset() {
    return commentsOffset;
  }
  
  
  function _handleEvents (e) {
    var origin = e.target || e.srcElement,
        parentId;
        
    // stupid IE
    origin = origin.id && M.getEl(origin.id) || false;

    if(origin) {
      parentId = u.checkNodeType(origin.parentNode)==='element' && origin.parentNode.getAttribute('id') && origin.parentNode.id;
    } else {
      return false;
    }
    
    switch(origin.nodeName) {
      case 'A':
        switch (parentId) {
          case 'prev-comments':
          case 'top-prev-comments':
            if(e.preventDefault) {
              e.preventDefault();
            } else {
              e.returnValue =	false;
            }
            if(!isLoading) {
              _previousPage();
            }
            break;
          case 'next-comments':
          case 'top-next-comments':
            if(e.preventDefault) {
              e.preventDefault();
            } else {
              e.returnValue =	false;
            }
            if(!isLoading) {
              _nextPage();
            }
            break;
        }
        break;
    }
  }
  
  
  function _toggleNavLinks () {
    M.log(c.DEBUG,M.getEl('top-prev-comments'));
    if(pageNum <= commentsTotalPages && pageNum !== 1) {
      u.toggleVisibility.show('prev-comments');
      u.toggleVisibility.show('top-prev-comments');
    }
    
    if(pageNum >= 1 && pageNum !== commentsTotalPages) {
      u.toggleVisibility.show('next-comments');
      u.toggleVisibility.show('top-next-comments');
    }
    
    if(pageNum===1 || nav.style.visibility==='hidden') {
      u.toggleVisibility.hide('prev-comments');
      u.toggleVisibility.hide('top-prev-comments');
    }
    
    if(pageNum===commentsTotalPages || nav.style.visibility==='hidden') {
      u.toggleVisibility.hide('next-comments');
      u.toggleVisibility.hide('top-next-comments');
    }
  }
  
  
  function _nextPage () {
    if(pageNum < commentsTotalPages) {
      pageNum++;
      _updateComments();
    }
  }
  
  
  function _previousPage() {
    if(pageNum > 1) {
      pageNum--;
      _updateComments();
    }
  }
  
  
  function _findIdMatch (id) {
    var len = MT.commentIds.length;
    
  	while (len--) {
  		if (MT.commentIds[len] == id) {
  			commentAnchor = "comment-" + id;
  			commentArrId = len;
  			return true;
  		}
  	}
  	
  	return false;
  }
  
  
  function _setCurrentComments() {
    var commentsOnPage = pageNum != commentsTotalPages ? commentsOffset + commentsPerPage : totalComments;
    
    _setCurrentCommentsContent([commentsOffset+1," - ",commentsOnPage].join(''));
  }
  
  
  function _setCurrentCommentsContent(currentCommentsHTML) {
    currentCommentsSpan.innerHTML = currentCommentsHTML;
    topCurrentCommentsSpan.innerHTML = currentCommentsHTML;
  }
  
  
  function _setCommentContent(commentHTML) {
    commentContentDiv.innerHTML = commentHTML;
  }
  
  
  function _updateComments() {
    var comments, jsonUrl, cacheKey, offset;
    isLoading = true;
    _setCurrentCommentsContent(loadingIcon);
    _setCommentOffset();

    offset   = _getCommentOffset();
    cacheKey = [direction, entryID, commentsPerPage, offset]
        .join('-')
        .replace(/[^a-zA-Z0-9-]/g, '');
    jsonUrl  = [
        "[[softurl]]/mt-comments.cgi?__mode=comment_listing&direction=",
        direction,
        "&entry_id=",
        entryID,
        "&limit=",
        commentsPerPage,
        "&offset=",
        offset,
        "&cacheKey=",
        cacheKey,
        "&jsonp=mtUpdateCommentsCallback",
        "&ts=",
        new Date().getTime()
      ].join('');
  	
  	if (!commentAnchor) {
      commentAnchor = "comments-content";
    }

    if(cache.hasOwnProperty(cacheKey)) {
      _refreshComments(cache[cacheKey]);
      isLoading = false;
    } else {
      var script = document.createElement('script');
      script.src = jsonUrl;
      (document.getElementsByTagName('head'))[0].appendChild(script);
    }
  }

  window['mtUpdateCommentsCallback'] = function(json) {
    cache[json.cacheKey] = json.comments;
    _refreshComments(json.comments);
    isLoading = false;
  }
  
  
  function _refreshComments(commentData) {
    _setCommentContent(commentData);
    _setCurrentComments();
    window.location.hash = 'reset';
    window.location.hash = commentAnchor;
    _toggleNavLinks();
  }
})();


function mtRelativeDate(ts, fds) {
    var now = new Date();
    var ref = ts;
    var delta = Math.floor((now.getTime() - ref.getTime()) / 1000);

    var str;
    if (delta < 60) {
        str = 'moments ago';
    } else if (delta <= 86400) {
        // less than 1 day
        var hours = Math.floor(delta / 3600);
        var min = Math.floor((delta % 3600) / 60);
        if (hours == 1)
            str = '1 hour ago';
        else if (hours > 1)
            str = '2 hours ago'.replace(/2/, hours);
        else if (min == 1)
            str = '1 minute ago';
        else
            str = '2 minutes ago'.replace(/2/, min);
    } else if (delta <= 604800) {
        // less than 1 week
        var days = Math.floor(delta / 86400);
        var hours = Math.floor((delta % 86400) / 3600);
        if (days == 1)
            str = '1 day ago';
        else if (days > 1)
            str = '2 days ago'.replace(/2/, days);
        else if (hours == 1)
            str = '1 hour ago';
        else
            str = '2 hours ago'.replace(/2/, hours);
    }
    return str ? str : fds;
}


function mtEditLink(entry_id, author_id) {
    
    
}


function mtCommentFormOnFocus() {
    // if CAPTCHA is enabled, this causes the captcha image to be
    // displayed if it hasn't been already.
    mtShowCaptcha();
}


var mtCaptchaVisible = false;
function mtShowCaptcha() {
    var u = mtGetUser();
    if ( u && u.is_authenticated ) return;
    if (mtCaptchaVisible) return;
    var div = document.getElementById('comments-open-captcha');
    if (div) {
        div.innerHTML = '';
        mtCaptchaVisible = true;
    }
}



var is_preview;
var user;

function mtSetUser(u) {
    if (u) {
        // persist this
        user = u;
        mtSaveUser();
        // sync up user greeting
        mtFireEvent('usersignin');
    }
}


function mtEscapeJS(s) {
    s = s.replace(/'/g, "&apos;");
    return s;
}


function mtUnescapeJS(s) {
    s = s.replace(/&apos;/g, "'");
    return s;
}


function mtBakeUserCookie(u) {
    var str = "";
    if (u.name) str += "name:'" + mtEscapeJS(u.name) + "';";
    if (u.url) str += "url:'" + mtEscapeJS(u.url) + "';";
    if (u.email) str += "email:'" + mtEscapeJS(u.email) + "';";
    if (u.is_authenticated) str += "is_authenticated:'1';";
    if (u.profile) str += "profile:'" + mtEscapeJS(u.profile) + "';";
    if (u.userpic) str += "userpic:'" + mtEscapeJS(u.userpic) + "';";
    if (u.sid) str += "sid:'" + mtEscapeJS(u.sid) + "';";
    str += "is_trusted:'" + (u.is_trusted ? "1" : "0") + "';";
    str += "is_author:'" + (u.is_author ? "1" : "0") + "';";
    str += "is_banned:'" + (u.is_banned ? "1" : "0") + "';";
    str += "can_post:'" + (u.can_post ? "1" : "0") + "';";
    str += "can_comment:'" + (u.can_comment ? "1" : "0") + "';";
    str = str.replace(/;$/, '');
    return str;
}


function mtUnbakeUserCookie(s) {
    if (!s) return;

    var u = {};
    var m;
    while (m = s.match(/^((name|url|email|is_authenticated|profile|userpic|sid|is_trusted|is_author|is_banned|can_post|can_comment):'([^']+?)';?)/)) {
        s = s.substring(m[1].length);
        if (m[2].match(/^(is|can)_/)) // boolean fields
            u[m[2]] = m[3] == '1' ? true : false;
        else
            u[m[2]] = mtUnescapeJS(m[3]);
    }
    if (u.is_authenticated) {
        u.is_anonymous = false;
    } else {
        u.is_anonymous = true;
        u.can_post = false;
        u.is_author = false;
        u.is_banned = false;
        u.is_trusted = false;
    }
    return u;
}


function mtGetUser() {
    if (!user) {
        var cookie = mtGetCookie(mtCookieName);
        if (!cookie) return;
        user = mtUnbakeUserCookie(cookie);
        if (! user) {
            user = {};
            user.is_anonymous = true;
            user.can_post = false;
            user.is_author = false;
            user.is_banned = false;
            user.is_trusted = false;
        }
    }
    return user;
}


var mtFetchedUser = false;

function mtFetchUser(cb) {
    if (!cb) cb = 'mtSetUser';
    if ( ( cb == 'mtSetUser' ) && mtGetUser() ) {
        var url = document.URL;
        url = url.replace(/#.+$/, '');
        url += '#comments-open';
        location.href = url;
    } else {
        // we aren't using AJAX for this, since we may have to request
        // from a different domain. JSONP to the rescue.
        mtFetchedUser = true;
        var u = mtGetUser();
        var script = document.createElement('script');
        var ts = new Date().getTime();
        script.src = '[[softurl]]/mt-comments.cgi?__mode=userinfo&blog_id=1&jsonp=' + cb + '&ts=' + ts + '&sid=' + u.sid;
        (document.getElementsByTagName('head'))[0].appendChild(script);
    }
}

function mtVerifySession(cb) {
    if (!cb) return;
    var script = document.createElement('script');
    var ts = new Date().getTime();
    var u = mtGetUser();
    script.src = '[[softurl]]/mt-comments.cgi?__mode=verify_session&blog_id=1&jsonp=' + cb + '&ts=' + ts + '&sid=' + u.sid;
    (document.getElementsByTagName('head'))[0].appendChild(script);
}



function mtRememberMeOnClick(b) {
    if (!b.checked)
        mtClearUser(b.form);
    return true;
}



var mtRequestSubmitted = false;
function mtCommentOnSubmit(f) {
    if (!mtRequestSubmitted) {
        mtRequestSubmitted = true;

        if (f.armor)
            f.armor.value = 'b90d0e341ac551168ee25df3a7d1e8d0ece5cca5';
        if (f.bakecookie && f.bakecookie.checked)
            mtSaveUser(f);

        // disable submit buttons
        if (f.preview_button) f.preview_button.disabled = true;
        if (f.post) f.post.disabled = true;

        var u = mtGetUser();
        if ( !is_preview && ( u && u.is_authenticated ) ) {
            // validate session; then submit
            mtVerifySession('mtCommentSessionVerify');
            return false;
        }

        return true;
    }
    return false;
}

function mtCommentSessionVerify(app_user) {
    var f = document['comments_form'];
    if ( app_user && app_user.verified ) {
        f.submit();
    } else {
        alert('Your session has expired. Please sign in again to comment.');
        mtClearUser();
        mtFireEvent('usersignin');

        mtShow('comments-form');
        mtHide('comments-open-footer');

    }
}

function mtUserOnLoad() {
    var u = mtGetUser();

    // if the user is authenticated, hide the 'anonymous' fields
    // and any captcha input if already shown
    if ( document.getElementById('comments-form')) {
        if ( u && u.is_authenticated ) {
            mtShow('comments-form');
            mtHide('comments-open-data');
            if (mtCaptchaVisible)
                mtHide('comments-open-captcha');
        } else {

            mtHide('comments-form');

        }
        if ( u && u.is_banned )
            mtHide('comments-form');

        // if we're previewing a comment, make sure the captcha
        // field is visible
        if (is_preview)
            mtShowCaptcha();
        else
            mtShowGreeting();

        // populate anonymous comment fields if user is cookied as anonymous
        var cf = document['comments_form'];
        if (cf) {
            if (u && u.is_anonymous) {
                if (u.email) cf.email.value = u.email;
                if (u.name) cf.author.value = u.name;
                if (u.url) cf.url.value = u.url;
                if (cf.bakecookie)
                    cf.bakecookie.checked = u.name || u.email;
            } else {
                if (u && u.sid && cf.sid)
                    cf.sid.value = u.sid;
            }
            if (cf.post && cf.post.disabled)
                cf.post.disabled = false;
            if (cf.preview_button && cf.preview_button.disabled)
                cf.preview_button.disabled = false;
            mtRequestSubmitted = false;
        }
    }
}




function mtEntryOnLoad() {
    var cf = document['comments_form'];
    if (cf && cf.preview) cf.preview.value = '';
    
    
    mtFireEvent('usersignin');
}

function mtEntryOnUnload() {
    if (mtRequestSubmitted) {
        var cf = document['comments_form'];
        if (cf) {
            if (cf.post && cf.post.disabled)
                cf.post.disabled = false;
            if (cf.preview_button && cf.preview_button.disabled)
                cf.preview_button.disabled = false;
        }
        mtRequestSubmitted = false;
    }
    return true;
}

mtAttachEvent('usersignin', mtUserOnLoad);



function mtSignIn() {
    var doc_url = document.URL;
    doc_url = doc_url.replace(/#.+/, '');
    var url = '[[softurl]]/mt-comments.cgi?__mode=login&blog_id=1';
    if (is_preview) {
        if ( document['comments_form'] ) {
            var entry_id = document['comments_form'].entry_id.value;
            url += '&entry_id=' + entry_id;
        } else {
            url += '&return_url=[[raw_wwwurl]]';
        }
    } else {
        url += '&return_url=' + encodeURIComponent(doc_url);
    }
    mtClearUser();
    location.href = url;
}

function mtSignInOnClick(sign_in_element) {
    var el;
    if (sign_in_element) {
        // display throbber
        el = document.getElementById(sign_in_element);
        if (!el)  // legacy MT 4.x element id
            el = document.getElementById('comment-form-external-auth');
    }
    if (el)
        el.innerHTML = 'Signing in... <span class="status-indicator">&nbsp;</span>';

    mtClearUser(); // clear any 'anonymous' user cookie to allow sign in
    mtSignIn();
    return false;
}

function mtSetUserOrLogin(u) {
    if (u && u.is_authenticated) {
        mtSetUser(u);
    } else {
        // user really isn't logged in; so let's do this!
        mtSignIn();
    }
}


function mtSignOut(entry_id) {
    mtClearUser();
    var doc_url = document.URL;
    doc_url = doc_url.replace(/#.+/, '');
    var url = '[[softurl]]/mt-comments.cgi?__mode=handle_sign_in&static=0&logout=1&blog_id=1';
    if (is_preview) {
        if ( document['comments_form'] ) {
            var entry_id = document['comments_form'].entry_id.value;
            url += '&entry_id=' + entry_id;
        } else {
            url += '&return_url=[[raw_wwwurl]]';
        }
    } else {
        url += '&return_url=' + encodeURIComponent(doc_url);
    }
    location.href = url;
}


function mtSignOutOnClick() {
    mtSignOut();
    return false;
}



function mtShowGreeting() {

    var reg_reqd = true;

    var cf = document['comments_form'];
    if (!cf) return;

    var el = document.getElementById('comment-greeting');
    if (!el)  // legacy MT 4.x element id
        el = document.getElementById('comment-form-external-auth');
    if (!el) return;

    var eid = cf.entry_id;
    var entry_id;
    if (eid) entry_id = eid.value;

    var phrase;
    var u = mtGetUser();

    if ( u && u.is_authenticated ) {
        if ( u.is_banned ) {
            phrase = 'You do not have permission to comment on this blog. (\<a href=\"javas\cript:void(0);\" onclick=\"return mtSignOutOnClick();\"\>sign out\<\/a\>)';
        } else {
            var user_link;
            if ( u.is_author ) {
                user_link = '<a href="[[softurl]]/mt-comments.cgi?__mode=edit_profile&blog_id=1&return_url=' + encodeURIComponent( location.href );
                user_link += '">' + u.name + '</a>';
            } else {
                // registered user, but not a user with posting rights
                if (u.url)
                    user_link = '<a href="' + u.url + '">' + u.name + '</a>';
                else
                    user_link = u.name;
            }
            // TBD: supplement phrase with userpic if one is available.
            phrase = 'Thanks for signing in, __NAME__. (\<a href=\"javas\cript:void(0)\" onclick=\"return mtSignOutOnClick();\"\>sign out\<\/a\>)';
            phrase = phrase.replace(/__NAME__/, user_link);
        }
    } else {
        if (reg_reqd) {
            phrase = '\<a href=\"javas\cript:void(0)\" onclick=\"return mtSignInOnClick(\'comment-greeting\')\"\>Sign in\<\/a\> to comment.';
        } else {
            phrase = '\<a href=\"javas\cript:void(0)\" onclick=\"return mtSignInOnClick(\'comment-greeting\')\"\>Sign in\<\/a\> to comment, or comment anonymously.';
        }
    }
    el.innerHTML = phrase;

}



function mtReplyCommentOnClick(parent_id, author) {
    mtShow('comment-form-reply');

    var checkbox = document.getElementById('comment-reply');
    var label = document.getElementById('comment-reply-label');
    var text = document.getElementById('comment-text');

    // Populate label with new values
    var reply_text = 'Replying to \<a href=\"#comment-__PARENT__\" onclick=\"location.href=this.href; return false\"\>comment from __AUTHOR__\<\/a\>';
    reply_text = reply_text.replace(/__PARENT__/, parent_id);
    reply_text = reply_text.replace(/__AUTHOR__/, author);
    label.innerHTML = reply_text;

    checkbox.value = parent_id; 
    checkbox.checked = true;
    try {
        // text field may be hidden
        text.focus();
    } catch(e) {
    }

    mtSetCommentParentID();
}


function mtSetCommentParentID() {
    var checkbox = document.getElementById('comment-reply');
    var parent_id_field = document.getElementById('comment-parent-id');
    if (!checkbox || !parent_id_field) return;

    var pid = 0;
    if (checkbox.checked == true)
        pid = checkbox.value;
    parent_id_field.value = pid;
}


function mtSaveUser(f) {
    // We can't reliably store the user cookie during a preview.
    if (is_preview) return;

    var u = mtGetUser();

    if (f && (!u || u.is_anonymous)) {
        if ( !u ) {
            u = {};
            u.is_authenticated = false;
            u.can_comment = true;
            u.is_author = false;
            u.is_banned = false;
            u.is_anonymous = true;
            u.is_trusted = false;
        }
        if (f.author != undefined) u.name = f.author.value;
        if (f.email != undefined) u.email = f.email.value;
        if (f.url != undefined) u.url = f.url.value;
    }

    if (!u) return;

    var cache_period = mtCookieTimeout * 1000;

    // cache anonymous user info for a long period if the
    // user has requested to be remembered
    if (u.is_anonymous && f && f.bakecookie && f.bakecookie.checked)
        cache_period = 365 * 24 * 60 * 60 * 1000;

    var now = new Date();
    mtFixDate(now);
    now.setTime(now.getTime() + cache_period);

    var cmtcookie = mtBakeUserCookie(u);
    mtSetCookie(mtCookieName, cmtcookie, now, mtCookiePath, mtCookieDomain,
        location.protocol == 'https:');
}


function mtClearUser() {
    user = null;
    mtDeleteCookie(mtCookieName, mtCookiePath, mtCookieDomain,
        location.protocol == 'https:');
}


function mtSetCookie(name, value, expires, path, domain, secure) {
    if (domain && ( domain.match(/^\.?localhost$/) || domain.match(/^[0-9\.]+$/) ))
        domain = null;
    var curCookie = name + "=" + encodeURIComponent(value) +
        (expires ? "; expires=" + expires.toGMTString() : "") +
        (path ? "; path=" + path : "") +
        (domain ? "; domain=" + domain : "") +
        (secure ? "; secure" : "");
    document.cookie = curCookie;
}


function mtGetCookie(name) {
    var prefix = name + '=';
    var c = document.cookie;
    var cookieStartIndex = c.indexOf(prefix);
    if (cookieStartIndex == -1)
        return '';
    var cookieEndIndex = c.indexOf(";", cookieStartIndex + prefix.length);
    if (cookieEndIndex == -1)
        cookieEndIndex = c.length;
    var this_cookie = c.substring(cookieStartIndex + prefix.length, cookieEndIndex);
    if ( this_cookie.match(/\%u/i) ) {
        return '';
    }
    return decodeURIComponent( this_cookie );
}


function mtDeleteCookie(name, path, domain, secure) {
    if (mtGetCookie(name)) {
        if (domain && domain.match(/^\.?localhost$/))
            domain = null;
        document.cookie = name + "=" +
            (path ? "; path=" + path : "") +
            (domain ? "; domain=" + domain : "") +
            (secure ? "; secure" : "") +
            "; expires=Thu, 01-Jan-70 00:00:01 GMT";
    }
}

function mtFixDate(date) {
    var skew = (new Date(0)).getTime();
    if (skew > 0)
        date.setTime(date.getTime() - skew);
}


function mtGetXmlHttp() {
    if ( !window.XMLHttpRequest ) {
        window.XMLHttpRequest = function() {
            var types = [
                "Microsoft.XMLHTTP",
                "MSXML2.XMLHTTP.5.0",
                "MSXML2.XMLHTTP.4.0",
                "MSXML2.XMLHTTP.3.0",
                "MSXML2.XMLHTTP"
            ];

            for ( var i = 0; i < types.length; i++ ) {
                try {
                    return new ActiveXObject( types[ i ] );
                } catch( e ) {}
            }

            return undefined;
        };
    }
    if ( window.XMLHttpRequest )
        return new XMLHttpRequest();
}

// BEGIN: fast browser onload init
// Modifications by David Davis, DWD
// Dean Edwards/Matthias Miller/John Resig
// http://dean.edwards.name/weblog/2006/06/again/?full#comment5338

function mtInit() {
    // quit if this function has already been called
    if (arguments.callee.done) return;

    // flag this function so we don't do the same thing twice
    arguments.callee.done = true;

    // kill the timer
    // DWD - check against window
    if ( window._timer ) clearInterval(window._timer);

    // DWD - fire the window onload now, and replace it
    if ( window.onload && ( window.onload !== window.mtInit ) ) {
        window.onload();
        window.onload = function() {};
    }


    mtInitCommenter();


}

/* for Mozilla/Opera9 */
if (document.addEventListener) {
    document.addEventListener("DOMContentLoaded", mtInit, false);
}

/* for Internet Explorer */
/*@cc_on @*/
/*@if (@_win32)
if (!document.addEventListener){
  document.write("<script id=__ie_onload defer src=//:><\/script>");
  var script = document.getElementById("__ie_onload");
  script.onreadystatechange = function() {
      if (this.readyState == "complete") {
          mtInit(); // call the onload handler
      }
  };
}
/*@end @*/

/* for Safari */
if (/WebKit/i.test(navigator.userAgent)) { // sniff
    _timer = setInterval(function() {
        if (/loaded|complete/.test(document.readyState)) {
            mtInit(); // call the onload handler
        }
    }, 10);
}

/* for other browsers */
window.onload = mtInit;

// END: fast browser onload init




function mtLoggedIn(ott) {
    var script = document.createElement('script');
    var ts = new Date().getTime();
    script.src = '[[softurl]]/mt-comments.cgi?__mode=userinfo&jsonp=mtSaveUserInfo&ott=' + ott;
    (document.getElementsByTagName('head'))[0].appendChild(script);
}

function mtRefreshUserInfo(sid) {
    var script = document.createElement('script');
    var ts = new Date().getTime();
    script.src = '[[softurl]]/mt-comments.cgi?__mode=userinfo&jsonp=mtSaveUserInfo&sid=' + sid;
    (document.getElementsByTagName('head'))[0].appendChild(script);
}

function mtSaveUserInfo (u) {
    if ( u.error ) {
        if ( !user ) {
            alert('The sign-in attempt was not successful; Please try again.');
        }
        return;
    }
    user = null;
    var cmtcookie = mtBakeUserCookie(u);
    var now = new Date();
    var cache_period = mtCookieTimeout * 1000;

    // cache anonymous user info for a long period if the
    // user has requested to be remembered
    mtFixDate(now);
    now.setTime(now.getTime() + cache_period);
    mtSetCookie(mtCookieName, cmtcookie, now, mtCookiePath, mtCookieDomain,
        location.protocol == 'https:');
    mtFireEvent('usersignin');
}

function mtInitCommenter () {
    /***
     * If request contains a '#_login' or '#_logout' hash, use this to
     * also delete the blog-side user cookie, since we're coming back from
     * a login, logout or edit profile operation.
     */

    var hash = ( window.location.hash );
    hash.match( /^#_(.*)$/ );
    var command = RegExp.$1 || '';
    if ( command === 'refresh' ) {
        // Back from profile edit screen.
        // Reload userinfo with current session ID.
        var u = mtGetUser();
        user  = null;
        mtRefreshUserInfo(u.sid);
    }
    else if ( command === 'logout' ) {
        // clear any logged in state
        mtClearUser();
        mtFireEvent('usersignin');
    }
    else if ( command.match( /^login_(.*)$/ ) ) {
        var sid = RegExp.$1;
        mtLoggedIn(sid);
    }
    else {
        mtFireEvent('usersignin');
    }
}