每点击一下事件,层自动向右移??????????

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<title> New Document </title>
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<script language="JavaScript">
<!--
function move(obj)
{
var l = obj.style.left;
var ll = l.replace("px","") *1;
obj.style.left = (ll + 100) + "px";
}
//-->
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</head><body><div style="position:absolute;left:0px;border:1px solid red;" onclick="move(this)">点击右移动</div>
</body>
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