/*
 
Correctly handle PNG transparency in Win IE 5.5 & 6.
http://homepage.ntlworld.com/bobosola. Updated 18-Jan-2006.

Use in <HEAD> with DEFER keyword wrapped in conditional comments:
<!--[if lt IE 7]>
<script defer type="text/javascript" src="pngfix.js"></script>
<![endif]-->

*/

var arVersion = navigator.appVersion.split("MSIE")
var version = parseFloat(arVersion[1])

if (version >= 5.5 && version <7 &&(document.body.filters)) 
{
   for(var i=0; i<document.images.length; i++)
   {
      var img = document.images[i]
      var imgName = img.src.toUpperCase()
      if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
      {
         var imgID = (img.id) ? "id='" + img.id + "' " : ""
         var imgClass = (img.className) ? "class='" + img.className + "' " : ""
         var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
         var imgStyle = "display:inline-block;" + img.style.cssText 
         if (img.align == "left") imgStyle = "float:left;" + imgStyle
         if (img.align == "right") imgStyle = "float:right;" + imgStyle
         if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle
         var strNewHTML = "<span " + imgID + imgClass + imgTitle
         + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
         + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
         + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
         img.outerHTML = strNewHTML
         i = i-1
      }
   }
}

function imgSwap(oImg)
{
	var arVersion = navigator.appVersion.split("MSIE")
	var version = parseFloat(arVersion[1])
	if ((version <7) && document.body && document.body.filters) 
	{
	   var strOver  = "_on"
	   var strOff = "_off"
	   var oSpan = oImg;
	   var currentAlphaImg = oSpan.filters(0).src
	   if (currentAlphaImg.indexOf(strOver) != -1)
	      oSpan.filters(0).src = currentAlphaImg.replace(strOver,strOff)
	   else
	      oSpan.filters(0).src = currentAlphaImg.replace(strOff,strOver)
	}
	else{
	var strOver  = "_on"    // image to be used with mouse over
	   var strOff = "_off"     // normal image
	   var strImg = oImg.src
	   if (strImg.indexOf(strOver) != -1) 
	      oImg.src = strImg.replace(strOver,strOff)
	   else
	      oImg.src = strImg.replace(strOff,strOver)
	}
}
