<script>

var img=null;

function s()

{

if(img)img.removenode(true);

img=document.createelement(img);

img.style.position=absolute;

img.style.visibility=hidden;

img.attachevent(onreadystatechange,orsc);

img.attachevent(onerror,oe);

document.body.insertadjacentelement(beforeend,img);

img.src=inp.value;

}

function oe()

{

alert(cant load img);

}

function orsc()

{

if(img.readystate!=complete)return false;

alert(图片大小：+img.offsetwidth+x+img.offsetheight);

alert(图片尺寸：+img.filesize);

}

</script>

<input id=inp type=file>

<br>

<button onclick=s()>test</button>