function addLightBox()
	{
		var div = $("itemarea");
		if(!div)return;
		if(document.getElementsByTagName)
			var as = div.getElementsByTagName("a");//若a标签不存在,返回长度为0的数组
		if(as.length>0)
			var a = as[0];
		if(!a) return;
		a.rel = "lightbox";
		var titles = document.getElementsByTagName("title");
		a.title = titles.length > 0 ? titles[0].innerHTML : "";
	}