function xlxs(obj)
{
var reId;
var reidd;
reidd="xl"+obj;
imgxl="imgxl"+obj
if(document.getElementById(reidd).style.display=="block"){
document.getElementById(reidd).style.display="none";
document.getElementById(imgxl).src="images/jia.jpg";
}
else{
	document.getElementById(reidd).style.display="block";
	document.getElementById(imgxl).src="images/jian.jpg";
	}
}