function qiehuan(obj){
	var imgurl = obj.url || obj.title || "pro_pic_1.jpg";
	var img = document.getElementById("img_container");
	var str = "<img src="+imgurl+" />";
	img.innerHTML = str;
}
function getSize(url){
	var img = new Image();
	img.src =url;
	img.style.display = 'none';
	var b = document.getElementsByTagName("body")[0];
	b.appendChild(img);
	return {width:img.width,height:img.width}
}