js 取得图片大小

<script src="scripts/jquery.js" type="text/javascript"></script> <div><div id="getUrlPicHeight" style="display:block;"><img src=""  /></div></div><button id="sory">按这里</button> <input id="ssssss" type="text"/><script  type="text/javascript">$(function(){var loadBigPicToBody=function(picUrl){$('img',$("#getUrlPicHeight")).attr('src',picUrl);}$("#sory").on("click",function(){ var image = new Image();image.src = $("#ssssss").val()+'?'+getTimeStamp();image.onreadystatechange=function(){ if (image.readyState=="complete" || image.readystate=="loaded") {alert(["图片大小是:",image.width,image.height]);}}})})function getTimeStamp(){var d,s;d=new Date();s=d.getFullYear().toString();s+=(Number(d.getMonth())+1).toString();s+=d.getHours().toString();s+=d.getMinutes().toString();s+=d.getSeconds().toString();return s;}</script>