// from http://www.kryogenix.org
// by Scott Andrew - http://scottandrew.com
// add an eventlistener to browsers that can do it somehow.
function addEvent(obj, evType, fn)
 {
 if (obj.addEventListener)
  {
  obj.addEventListener(evType, fn, false);
  return true;
  }
 else if (obj.attachEvent)
  {
  var r = obj.attachEvent('on'+evType, fn);
  return r;
  }
 else
  {
  return false;
  }
 }

// Force IE not to show alternate text as tooltip
function noAltTooltip()
 {
 images = document.getElementsByTagName('img');
 for (var i = 0; i < images.length; i++)
  {
  var title = images[i].getAttribute('title');
  var alt = images[i].getAttribute('alt');
  if ((document.all) && (alt) && (!title))
   {
   images[i].setAttribute('title', '');
   }
  }
 }

// Nice Titles

// original code by Stuart Langridge 2003-11
// with additions to the code by other good people
// http://www.kryogenix.org/code/browser/nicetitle/
// thank you, sir

// modified by Peter Janes 2003-03-25
// http://peterjanes.ca/blog/archives/2003/03/25/nicetitles-for-ins-and-del
// added in ins and del tags

// modified by Dunstan Orchard 2003-11-18
// http://1976design.com/blog/
// added in accesskey information
// tried ever-so-hard, but couldn't work out how to do what Ethan did

// final genius touch by by Ethan Marcotte 2003-11-18
// http://www.sidesh0w.com/
// worked out how to delay showing the popups to make them more like the browser's own

// set the namespace
var XHTMLNS = 'http://www.w3.org/1999/xhtml';
var CURRENT_NICE_TITLE;

// browser sniff
var browser = new Browser();

// determine browser and version.
function Browser()
 {
 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;
  }
 }

// 2003-11-19 sidesh0w
// set delay vars to emulate normal hover delay
var delay;
var interval = 0.60;

// this function runs on window load
// it runs through all the links on the page as starts listening for actions
function makeNiceTitles()
 {
 if (!document.createElement || !document.getElementsByTagName) return;
 if (!document.createElementNS)
  {
  document.createElementNS = function(ns, elt)
   {
   return document.createElement(elt);
   }
  }

 // do regular links
 if (!document.links)
  {
  document.links = document.getElementsByTagName('a');
  }
 for (var ti=0; ti<document.links.length; ti++)
  {
  var lnk = document.links[ti];
  // * I added specific class names here..
  if (lnk.title)
   {
   lnk.setAttribute('nicetitle', lnk.title);
   lnk.removeAttribute('title');
   addEvent(lnk, 'mouseover', showDelay);
   addEvent(lnk, 'mouseout', hideNiceTitle);
   addEvent(lnk, 'focus', showDelay);
   addEvent(lnk, 'blur', hideNiceTitle);
   }
  }

 // 2003-03-25 Peter Janes
 // do ins and del tags
 var tags = new Array(2);
 tags[0] = document.getElementsByTagName('ins');
 tags[1] = document.getElementsByTagName('del');
 for (var tt=0; tt<tags.length; tt++)
  {
  if (tags[tt])
   {
   for (var ti=0; ti<tags[tt].length; ti++)
    {
    var tag = tags[tt][ti];
    if (tag.dateTime)
     {
     var strDate = tag.dateTime;
     // HTML/ISO8601 date: yyyy-mm-ddThh:mm:ssTZD (Z, -hh:mm, +hh:mm)
     var month = strDate.substring(5,7);
     var day = strDate.substring(8,10);
     if (month[0] == '0')
      {
      month = month[1];
      }
     if (day[0] == '0')
      {
      day = day[1];
      }
     var dtIns = new Date(strDate.substring(0,4), month-1, day, strDate.substring(11,13), strDate.substring(14,16), strDate.substring(17,19));
     tag.setAttribute('nicetitle', (tt == 0 ? 'Added' : 'Deleted') + ' on ' + dtIns.toString());
     addEvent(tag, 'mouseover', showDelay);
     addEvent(tag, 'mouseout', hideNiceTitle);
     addEvent(tag, 'focus', showDelay);
     addEvent(tag, '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 getParent(el, pTagName)
 {
 if (el == null)
  {
  return null;
  }
 // gecko bug, supposed to be uppercase
 else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase())
  {
  return el;
  }
 else
  {
  return getParent(el.parentNode, pTagName);
  }
 }

// 2003-11-19 sidesh0w
// trailerpark wrapper function
function showDelay(e)
 {
    if (window.event && window.event.srcElement)
  {
        lnk = window.event.srcElement
  }
 else if (e && e.target)
  {
        lnk = e.target
  }
    if (!lnk) return;

 // lnk is a textnode or an elementnode that's not ins/del
    if (lnk.nodeType == 3 || (lnk.nodeType == 1 && lnk.tagName.toLowerCase() != 'ins' && lnk.tagName.toLowerCase() != 'del'))
  {
  // ascend parents until we hit a link
  lnk = getParent(lnk, 'a');
  }

 delay = setTimeout("showNiceTitle(lnk)", interval * 1000);
 }

// build and show the nice titles
function showNiceTitle(link)
 {
    if (CURRENT_NICE_TITLE) hideNiceTitle(CURRENT_NICE_TITLE);
    if (!document.getElementsByTagName) return;

    nicetitle = lnk.getAttribute('nicetitle');

    var d = document.createElementNS(XHTMLNS, 'div');
    d.className = 'nicetitle';
    var dc = document.createElementNS(XHTMLNS, 'div');
    dc.className = 'nicetitle-content';
    d.appendChild(dc);
    tnt = document.createTextNode(nicetitle);
    pat = document.createElementNS(XHTMLNS, 'p');
    pat.className = 'titletext';
    pat.appendChild(tnt);

 // 2003-11-18 Dunstan Orchard
 // added in accesskey info
 if (lnk.accessKey)
  {
        axs = document.createTextNode(' [' + lnk.accessKey + ']');
  axsk = document.createElementNS(XHTMLNS, 'span');
        axsk.className = 'accesskey';
        axsk.appendChild(axs);
  pat.appendChild(axsk);
  }
    dc.appendChild(pat);

    if (lnk.href)
  {
        tnd = document.createTextNode(lnk.href);
        pad = document.createElementNS(XHTMLNS, 'p');
        pad.className = 'destination';
        pad.appendChild(tnd);
        dc.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';

    mpos = findPosition(lnk);
    mx = mpos[0];
    my = mpos[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)
 {
 // 2003-11-19 sidesh0w
 // clearTimeout
 if (delay) clearTimeout(delay);
 if (!document.getElementsByTagName) return;
 if (CURRENT_NICE_TITLE)
  {
  document.getElementsByTagName('body')[0].removeChild(CURRENT_NICE_TITLE);
  CURRENT_NICE_TITLE = null;
  }
 }
addEvent(window, "load", noAltTooltip);
addEvent(window, "load", makeNiceTitles);