addEvent(window, "load", makeNiceTitles);

var CURRENT_NICE_TITLE;
var browser = new Browser();

function makeNiceTitles() {
    if (!document.links || !document.createElement) return;
    for (var ti=0;ti<document.links.length;ti++) {
        var lnk = document.links[ti];
        if (lnk.title) {
            lnk.setAttribute("nicetitle",lnk.title);
            lnk.removeAttribute("title");
            addEvent(lnk,"mouseover",showNiceTitle);
            addEvent(lnk,"mouseout",hideNiceTitle);
            addEvent(lnk,"click",hideNiceTitle);
            addEvent(lnk,"dblclick",hideNiceTitle);
            addEvent(lnk,"mousedown",hideNiceTitle);
            addEvent(lnk,"mouseup",hideNiceTitle);
            addEvent(lnk,"focus",showNiceTitle);
            addEvent(lnk,"blur",hideNiceTitle);
        }
    }
    makeDatedTitles("ins", "Added on");
    makeDatedTitles("del", "Removed on");
}

function makeDatedTitles(tag, caption) {
    var instags = document.getElementsByTagName(tag);
    if (instags) {
        for (var ti=0;ti<instags.length;ti++) {
            var instag = instags[ti];
            if (instag.dateTime) {
                var strDate = instag.dateTime;
                var aDate = strDate.match(/^(\d\d\d\d)-?(\d\d)-?(\d\d)T(\d\d):?(\d\d):?(\d\d)(.)(\d\d):?(\d\d)/);
                var sDate;
                if (aDate && (aDate.length == 10)) {
                  var dtIns = new Date(aDate[1],aDate[2]-1,aDate[3],aDate[4],aDate[5],aDate[6]);
                  sDate = dtIns.toString();
                } else {
                  sDate = strDate;
                }
                instag.setAttribute("nicetitle",caption+' '+sDate);
                addEvent(instag,"mouseover",showNiceTitle);
                addEvent(instag,"mouseout",hideNiceTitle);
                addEvent(instag,"click",hideNiceTitle);
                addEvent(instag,"dblclick",hideNiceTitle);
                addEvent(instag,"mousedown",hideNiceTitle);
                addEvent(instag,"mouseup",hideNiceTitle);
                addEvent(instag,"focus",showNiceTitle);
                addEvent(instag,"blur",hideNiceTitle);
            }
        }
    }
}

function findPosition( oLink ) {
  if( oLink.offsetParent ) {
    for( var posX = 0, posY = 0; oLink.offsetParent; oLink = oLink.offsetParent ) {
      posX += oLink.offsetLeft;
      posY += oLink.offsetTop;
    }
    return [ posX, posY ];
  } else {
    return [ oLink.x, oLink.y ];
  }
}

function showNiceTitle(e) {
    if (!document.getElementsByTagName) return;
    if (window.event && window.event.srcElement) {
        lnk = window.event.srcElement
    } else if (e && e.target) {
        lnk = e.target
    }
    if (!lnk) return;
    if (lnk.nodeType == 3 || !lnk.getAttribute("nicetitle")) {
        // lnk is a textnode -- ascend parents until we hit a link
        lnk = getParent(lnk,"A");
    }
    if (!lnk) return;
    nicetitle = lnk.getAttribute("nicetitle");
    
    var d = document.createElement("div");
    d.className = "nicetitle";
    tnt = document.createTextNode(nicetitle);
    pat = document.createElement("p");
    pat.className = "titletext";
    pat.appendChild(tnt);
    d.appendChild(pat);
    // removed appending of url
    // if (lnk.href) {
    //    tnd = document.createTextNode(lnk.href);
    //    pad = document.createElement("p");
    //    pad.className = "destination";
    //    pad.appendChild(tnd);
    //    d.appendChild(pad);
    // }
    
    STD_WIDTH = 300;
//    if (lnk.href) {
//       h = lnk.href.length;
//   } else { h = nicetitle.length; }
 h = nicetitle.length;
  
    if (nicetitle.length) {
      t = nicetitle.length;
    }
    h_pixels = h*6; t_pixels = t*10;
    
    if (h_pixels > STD_WIDTH) {
        w = h_pixels;
    } else if ((STD_WIDTH>t_pixels) && (t_pixels>h_pixels)) {
        w = t_pixels;
    } else if ((STD_WIDTH>t_pixels) && (h_pixels>t_pixels)) {
        w = h_pixels;
    } else {
        w = STD_WIDTH;
    }
        
    d.style.width = w + 'px';    

    mpos = findPosition(lnk);
    mx = mpos[0];
    my = mpos[1];
    
    d.style.left = (mx+15) + 'px';
    d.style.top = (my+35) + 'px';

    if (document.body && document.body.offsetWidth && ((mx+w) > document.body.offsetWidth)) {
        d.style.left = (document.body.offsetWidth - w - 20) + "px";
    }
    
    document.getElementsByTagName("body")[0].appendChild(d);
    
    CURRENT_NICE_TITLE = d;
}

function hideNiceTitle(e) {
    if (!document.getElementsByTagName) return;
    if (CURRENT_NICE_TITLE) {
        document.getElementsByTagName("body")[0].removeChild(CURRENT_NICE_TITLE);
        CURRENT_NICE_TITLE = null;
    }
}

// Add an eventListener to browsers that can do it somehow.
// Originally by the amazing Scott Andrew.
function addEvent(obj, evType, fn){
  if (obj.addEventListener){
    obj.addEventListener(evType, fn, true);
    return true;
  } else if (obj.attachEvent){
	var r = obj.attachEvent("on"+evType, fn);
    return r;
  } else {
	return false;
  }
}

function getParent(el, pTagName) {
	if (el == null) return null;
	else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase())	// Gecko bug, supposed to be uppercase
		return el;
	else
		return getParent(el.parentNode, pTagName);
}

function getMousePosition(event) {
  if (browser.isIE) {
    x = window.event.clientX + document.documentElement.scrollLeft
      + document.body.scrollLeft;
    y = window.event.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  }
  if (browser.isNS) {
    x = event.clientX + window.scrollX;
    y = event.clientY + window.scrollY;
  }
  return [x,y];
}

// Determine browser and version.

function Browser() {
// blah, browser detect, but mouse-position stuff doesn't work any other way
  var ua, s, i;

  this.isIE    = false;
  this.isNS    = false;
  this.version = null;

  ua = navigator.userAgent;

  s = "MSIE";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isIE = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  s = "Netscape6/";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  // Treat any other "Gecko" browser as NS 6.1.
  s = "Gecko";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = 6.1;
    return;
  }
}