<script language="javascript">
function changeImg(mypic){
var xw=260;
var xl=320;

var width = mypic.width;
var height = mypic.height;

if (width > xw ) mypic.width = xw;
if (height > xl ) mypic.height = xl;
}
</script>
<script language = "JavaScript">
function bbimg(o){
var zoom=parseInt(o.style.zoom, 10)||100;
zoom+=event.wheelDelta/12;
if(zoom>0) o.style.zoom=zoom+'%';
return false;}
</script>
<IMG SRC=admin/UploadFile/20051230103852-17.jpg onload="changeImg(this)" onmousewheel="return bbimg(this)" onload="javascript:if(this.width>screen.width-600)
this.style.width=screen.width-600;">


var zoom=parseInt(o.style.zoom, 10)||100;
zoom+=event.wheelDelta/12;
是什么意思呀

parseInt：返回由字符串转换得到的整数