<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>下拉菜单</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>
Stardust1001
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