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()

	      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 

		     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

			    }

             }

		     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');\""

		     strNewHTML += " onmouseover=\"PNGswap('" + img.id + "');\" onmouseout=\"PNGswap('" + img.id +"');\""

		     strNewHTML += "></span>" 

		     img.outerHTML = strNewHTML

		     i = i-1

	      }

       }

   }

}

window.attachEvent("onload", correctPNG);



function PNGswap(myID)

{

   var strOver  = "_on"

   var strOff = "_off"

   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)

}



function imgSwap(oImg)

{

   var strOver  = "templatebild/lectures/LLTM613.png"    // image to be used with mouse over

   var strImg = oImg.src

   if (strImg.indexOf(strOver) == -1)oImg.src = strOver

   else oImg.src = 'templatebild/lectures/spc.gif'

}