addEvent(window, "load", makeNiceTitles);

var XHTMLNS = "http://www.w3.org/1999/xhtml";
var CURRENT_NICE_TITLE;
var browser = new Browser();

function makeNiceTitles()
{
    if (!document.createElement || !document.getElementsByTagName) return;
    // add namespace methods to HTML DOM; this makes the script work in both
    // HTML and XML contexts.
    if(!document.createElementNS)
    {
        document.createElementNS = function(ns, elt)
        {
            return document.createElement(elt);
        }
    }

    if( !document.links )
    {
        document.links = document.getElementsByTagName("a");
    }
    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, "focus", showNiceTitle);
            addEvent(lnk, "blur", hideNiceTitle);
        }
    }
    var instags = document.getElementsByTagName("ins");
    if (instags)
    {
	    for (var ti=0; ti<instags.length; ti++)
	    {
	        var instag = instags[ti];
	        if (instag.dateTime)
	        {
	            var strDate = instag.dateTime;
	            var dtIns = new Date(strDate.substring(0,4), parseInt(strDate.substring(4,6) - 1), strDate.substring(6,8), strDate.substring(9,11), strDate.substring(11,13), strDate.substring(13,15));
	            instag.setAttribute("nicetitle", "Added on " + dtIns.toString());
	            addEvent(instag, "mouseover", showNiceTitle);
	            addEvent(instag, "mouseout", 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 ( CURRENT_NICE_TITLE ) hideNiceTitle( CURRENT_NICE_TITLE );
    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 is a textnode -- ascend parents until we hit a link
        lnk = getParent(lnk,"A");
    }
    if ( !lnk ) return;
    nicetitle = lnk.getAttribute("nicetitle");
    
    var d = document.createElementNS(XHTMLNS, "div");
    d.className = "nicetitle";
    tnt = document.createTextNode( nicetitle );
    // create a paragraph tag to place nice text
    pat = document.createElementNS(XHTMLNS, "p");
    pat.className = "titletext";
    pat.appendChild( tnt );
    d.appendChild( pat );
    if( lnk.href )
    {
        tnd = document.createTextNode( lnk.href );
        pad = document.createElementNS(XHTMLNS, "p");
        pad.className = "destination";
        pad.appendChild( tnd );
        d.appendChild( pad );
    }
    
    STD_WIDTH = 300;
    if( lnk.href )
    {
    		h = lnk.href.length;
    }
    else
    {
    		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';    

    /*
    mx = lnk.offsetLeft;
    my = lnk.offsetTop;
    */
    mpos = findPosition( lnk );
    mx = mpos[0];
    my = mpos[1];
    //xy = getMousePosition(e);
    //mx = xy[0]; my = xy[1];
    
    d.style.left = (mx + 15) + 'px';
    d.style.top = (my + 35) + 'px';
    if( window.innerWidth && ((mx + w) > window.innerWidth) )
    {
        d.style.left = (window.innerWidth - w - 25) + "px";
    }
    if( document.body.scrollWidth && ((mx + w) > document.body.scrollWidth) )
    {
        d.style.left = (document.body.scrollWidth - w - 25) + "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;
  }
}