/*
  http://homepage.ntlworld.com/bobosola/pnginfo.htm
  png images need to have an ID if used with onmouseover / onmouseout
*/
var arVersion = navigator.appVersion.split("MSIE")
var version = parseFloat(arVersion[1])

function correctPNG() // correctly handle PNG transparency in Win IE 5.5 and 6.
{
   if ((version >= 5.5) && (document.body.filters)) 
   {
       for(var i=0; i<document.images.length; i++)
       {
        var img = document.images[i]
        var imgName = img.src.toUpperCase()
        // toepassen bij PNG bestanden, waarbij de klasse "m" is (menu buttons uit de header) of "fixpng"
        if ((imgName.substring(imgName.length-3, imgName.length) == "PNG") && (img.className=="fixpng" || img.className=="m"))
        {
         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 
         var imgAttribs = img.attributes;
         for (var j=0; j<imgAttribs.length; j++)
         {
          var imgAttrib = imgAttribs[j];
          if (imgAttrib.nodeName == "align")
          {     
             if (imgAttrib.nodeValue == "left") imgStyle = "float:left;" + imgStyle
             if (imgAttrib.nodeValue == "right") imgStyle = "float:right;" + imgStyle
             break
          }
         }
         if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle
         
         var strNewHTML = "<span " + imgID + imgClass + imgTitle
         strNewHTML += " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
         strNewHTML += "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
         strNewHTML += "(src='" + img.src + "', sizingMethod='scale');\""
         if (img.id)
         {
           strNewHTML += " onmouseover=\"PNGswap('" + img.id + "');\" onmouseout=\"PNGswap('" + img.id +"');\""
         }
         strNewHTML += "></span>" 
         img.outerHTML = strNewHTML
         i = i-1
        }
       }
   }
}
if (window.attachEvent) {
	window.attachEvent("onload", correctPNG);
}

function PNGswap(myID)
{
   var strOver  = "-1"
   var strOff = "-0"
   var oSpan = document.getElementById(myID)
   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)
}