//alert ( "LOADING" );
  
  function replacePngForOlderIE ( imageId, minWidth )  {

      try {
      var image = document.getElementById (imageId);
	  //alert ( "IMAGE: " + image );
	  
	     //if ( minWidth != null ) {
		//	 alert ( "ID: " + imageId +  " WIDTH: " + image.width );
		// }
	  
	 // alert ( " minWidth: " + minWidth );
	  
	        var imageWidth = image.width;
			if ( minWidth != null ) {
				if ( imageWidth < minWidth ) {
					// alert ( "ADJUSTED WIDTH" );
					imageWidth = minWidth;
				}
			}
			
			var newImage=document.createElement("div");
			newImage.style.width=image.width+'px';
			newImage.style.height=image.height+'px';
			newImage.id=image.id;
			newImage.className=image.className;
			var mask=image.src;
			newImage.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+mask+"',sizingMethod='scale')";
			
			var parent=image.parentNode;
			parent.replaceChild(newImage, image);	  
		} catch ( exc ) {
		   //alert ( "EXC IN REPLACING IMAGE: " + exc.toString() );
		}
   }	
   
   //alert ( "DOING IT" );
     var doReplacePngs = false;
	 
	 try {
	    var agt=navigator.userAgent.toLowerCase();
        var myApp = navigator.appName;
		if ( myApp.indexOf ( "Microsoft" ) >= 0 && agt.indexOf ("msie") >= 0 && agt.indexOf ("7.0") < 0 ) {
		   doReplacePngs = true;
		}
		// alert ( " MYAPP: " + myApp + " AGT: " + agt + " doReplacePngs: " + doReplacePngs );
	 } catch ( exc ) {
		 //alert ( "EXC DETERMINING AGENT: " + exc );
	 }   
	 
	// alert ( "SURVIVED DETECT: doReplacePngs " + doReplacePngs );

	function getReplacementImagePath ( imageElement ) {
		var imageSrc = imageElement.src;
		var len = imageSrc.length;
		var baseSrc = imageSrc.substr (0, len-4 );
		var replacementImagePath = baseSrc + ".gif";
		//alert ( "IMAGE SOURCE: " + imageSrc + " LEN: " + len + " BASE: " + baseSrc );
		//alert ( "REPLACEMENT PATH: " + replacementImagePath );
		
		return replacementImagePath;
	}
	
	var menuImageIds = [
		"homeLinkImage",
		"playGamesLinkImage",
		"prizesLinkImage",
		"submitQuestionsLinkImage",
		"communityLinkImage",
		
		"supportLinkImage",
		"registerLinkImage",
		"memberLinkImage"
		
	];
	
    function replaceMenuPngsIfNeeded () {
		if ( doReplacePngs ) {
			
			for ( var idx = 0; idx < menuImageIds.length; idx++ ) {
				var menuLinkImageId = menuImageIds[idx];
				var linkImage = document.getElementById ( menuLinkImageId );
			    var replacementImagePath = getReplacementImagePath (linkImage);
			    linkImage.src = replacementImagePath;
			}

			

	   }
	}