/*

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])

function fixPng()
{
	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" && img.className != "no-png-fix" && img.id != "no-png-fix")
		  {
			 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='image');\"";
			 if(img.parentElement.href)
			 strNewHTML += " onmouseover=\"iePngSwap('" + img.id + "');\" onmouseout=\"iePngSwap('" + img.id +"');\"";
			 strNewHTML += "></span>";
			 img.outerHTML = strNewHTML
			 i = i-1
		  }
	   }
	}
}
function iePngSwap(aImageId){
    iePngSwap(aImageId,false);
}

function iePngSwap(aImageId,aShowHideAltText){
   
   var oSpan = document.getElementById(aImageId);
	if(oSpan!=null){
		   var currentSrc = oSpan.style.filter;
   if (currentSrc.indexOf("_f2") != -1){
     oSpan.style.filter = currentSrc.replace("_f2","");
      if (aShowHideAltText){
      	hideAltText(aImageId);
      	lockedImages[aImageId]=true;
      }
   }
   else{
      oSpan.style.filter = currentSrc.replace(".png","_f2.png");
      if (aShowHideAltText){
        lockedImages[aImageId]=false;
      	window.setTimeout('showAltText("'+aImageId+'",'+(getIeMouseX())+','+(getIeMouseY()+15)+')',800);
      }
   }
	}
}