<!doctype html><html><head>? ? <meta charset="UTF-8">? ? <title>下拉菜單</title>? ? <style type="text/css">? ? .bbb {? ? width: 200px;? ? height: 200px;? ? background: red;? ? }? ? </style>? ?<script type="text/javascript">? ?window.onload = function(){? ? var obj= document.getElementById("divselect");? ? setInterval(function(){? ? ? ? console.log("obj.style.width:"+obj.style.width+ "obj.offsetWidth:"+obj.offsetWidth);? ? ? ? obj.style.width = obj.offsetWidth - 1 + "px";? ? },30);? ?}? ?</script></head><body>? ? <div id="divselect">? ? </div></body></html>
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