function imgSwap(oImg)
{
   var strOver  = "_up"    // image to be used with mouse over
   var strOff = "_over"     // normal image
   var strImg = oImg.src;
   var newName;
   var strFilter = "progid:DXImageTransform.Microsoft.AlphaImageLoader"
   
   if((/MSIE ((5\.5)|[6])/.test(navigator.userAgent) && navigator.platform == "Win32")){
    if(oImg.style.filter.indexOf("'") > 0){
        strImg = oImg.style.filter.substring(oImg.style.filter.indexOf("'")+1, oImg.style.filter.lastIndexOf("'"));
    }
   }else{
    strImg = oImg.src;
   }
   //alert(oImg.style.filter);
   if (strImg.indexOf(strOver) != -1) {
      newName  = strImg.replace(strOver,strOff)
      oImg.src = newName;
   }else{
      newName =  strImg.replace(strOff,strOver)
      oImg.src = newName
      }
      
   var origSrc;
   origSrc = newName;
   
   
    if(origSrc.indexOf(".png") > 0 && (/MSIE ((5\.5)|[6])/.test(navigator.userAgent) && navigator.platform == "Win32")){
     oImg.src = 'transparentpixel.gif';
     oImg.style.filter = strFilter + "(src='" + origSrc + "')";
     oImg.BJRFilterApplied = true;
     }
}