<script language="javascript">
var theID=null;
function aa(){
theID=document.getElementById("id1")
theID.style.visibility=theID.style.visibility=="visible"?"hidden":"visible";
}
</script>
<body>
<button onClick="aa()">开/关div</button><p>
<div id="id1" style="border:1 solid;width:200;height:150;visibility:hidden">
点击按钮来控制我呀。
</div>
</body>
<script language="javascript">
var theID=null;
function aa(){
theID=document.getElementById("id1")
theID.style.visibility=theID.style.visibility=="visible"?"hidden":"visible";
}
</script>
<body>
<input type=text onClick="aa()"></input><p>
<div id="id1" style="border:1 solid;width:200;height:150;visibility:hidden">
点击按钮来控制我呀。
</div>
</body>
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