/*
	Standards Compliant Rollover Script
	Author : Daniel Nolan
	http://www.bleedingego.co.uk/webdev.php
*/

function initRollovers() {
 if (!document.getElementById) return
 
 var aPreLoad = new Array();
 var sTempSrc;
 var aImages = document.getElementsByTagName('img');
 var oText = /_o\..{3,}$/i;
 var oTextPlain = '_o';
 

 for (var i = 0; i < aImages.length; i++) {
  if ((aImages[i].className == 'btn') && (aImages[i].src.search(oText) == -1)) {
   var src = aImages[i].getAttribute('src');
   var ftype = src.substring(src.lastIndexOf('.'), src.length);
   var hsrc = src.replace(ftype, oTextPlain+ftype);

   aImages[i].setAttribute('hsrc', hsrc);
   
   aPreLoad[i] = new Image();
   aPreLoad[i].src = hsrc;
   
   aImages[i].onmouseover = function() {
    sTempSrc = this.getAttribute('src');
    this.setAttribute('src', this.getAttribute('hsrc'));
   }
   
   aImages[i].onmouseout = function() {
    if (!sTempSrc) sTempSrc = this.getAttribute('src').replace(oTextPlain+ftype, ftype);
    this.setAttribute('src', sTempSrc);
   }
  }
 }
}

window.onload = initRollovers;