js动态加载显示图片，获取大小

<img name="img1" src="/images/bg/nophoto_s.gif" />

<input type="file" name="file1" />

<script>

$("input[name='file1']").change(function(){

$image = $("img[name='img1']");

$img = new Image();

$img.src= $(this).val();

$img.onload=function(){

alert($img.width + "," + $img.height + "," + $img.filesize);

}

$image.attr("src", $(this).val() + "?rnd="+Math.random());

});

</script>