如何得到一张图片的长与宽是多少像素

Question

<img src=abc.gif onload="alert(this.offsetHeight);alert(this.offsetWidth)">

Answer 1

<img id="guagua" src="open.gif" width="39" height="29" onclick="aa()"> 
<script language="JavaScript">
function aa()
{
b=document.getElementById("guagua");
document.write(b.width);
document.write(b.height);
}
</script>

Answer 2

this.offsetHeight和this.offsetWidth包括边框,clientHeight和clientWidth没有

Answer 3

获得某一图片有大小及尺寸
<img src=http://expert.csdn.net/images/csdn.gif border=0
 onload="alert('filesize : '+ this.fileSize +' Byte\r\nwidth : '+ this.clientWidth + '\r\nheight : '+ this.clientHeight)">