$(function(){
	    $("img.rollover").each(function(){
	        $("<img>").attr("src", $(this).attr("src").replace(/^(.+)(\.[a-z]+)$/, "$1_on$2"));
	    });
	 
	    if($.browser.msie && $.browser.version<7){
	        $("img.rollover").each(function(){
	            $(this)
	            .data("src", $(this).attr("src"))
	            .attr("src", "./images/transparent.gif")
	            .css("filter", "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+$(this).data("src")+"', sizingMethod='scale')");
	 
	        }).mouseover(function(){
	            $(this).css("filter", "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+$(this).data("src").replace(/^(.+)(\.[a-z]+)$/, "$1_on$2")+"', sizingMethod='scale')");
	        }).mouseout(function(){
	            $(this).css("filter", "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+$(this).data("src")+"', sizingMethod='scale')");
	        });
	 
	    }else{
	        $("img.rollover").mouseover(function(){
	            $(this).attr("src", $(this).attr("src").replace(/^(.+)(\.[a-z]+)$/, "$1_on$2"));
	        }).mouseout(function(){
	            $(this).attr("src", $(this).attr("src").replace(/^(.+)_on(\.[a-z]+)$/, "$1$2"));
	        });
	    }
});