function setPng24(obj)
{ 
	var request_os = window.navigator.userAgent; 
	var os_array = request_os.split(";"); 
	if(os_array[1] != " MSIE 7.0")
	{
		obj.width=obj.height=1; 
		obj.className=obj.className.replace(/png24/i,''); 
		obj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+ obj.src +"',sizingMethod='image');"; 
		obj.src='http://images.joins.com/ui_portal/portal2010/common/u_blank.gif'; 
	} 
	return ''; 
}