<form name=form action="" method=post encType=multipart/form-data><br />
<input onpropertychange=document.all.aaaa.src=this.value type=file name=upload/><br /><br />
宽:<input name=W/> 高:<input name=H/><br /><br />
<input type=submit value=提交/><br />
<img style="POSITION: absolute; TOP: -100000px" onerror='alert("类型错误或者目标不存在");'<br />
onload={<br />
document.all.W.value=this.width;<br />
document.all.H.value=this.height;<br />
} name=aaaa/><br />
</form>
<input onpropertychange=document.all.aaaa.src=this.value type=file name=upload/><br /><br />
宽:<input name=W/> 高:<input name=H/><br /><br />
<input type=submit value=提交/><br />
<img style="POSITION: absolute; TOP: -100000px" onerror='alert("类型错误或者目标不存在");'<br />
onload={<br />
document.all.W.value=this.width;<br />
document.all.H.value=this.height;<br />
} name=aaaa/><br />
</form>
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