<script type="text/javascript">
function myshow(){
//document.getElementById('mydiv').style.display = "none";
document.getElementById('mydiv').style.width = "160px";
} //block
function myhide(){
//document.getElementById('mydiv').style.display = "block";
document.getElementById('mydiv').style.width="1px";
}
//測試用，隨機生成一些內容，便于測試效果。
for(var i=0; i<400; i++)document.write("<div class=/"line"+(i%2)+"/">"+(new Array(20)).join((Math.random()*1000000).toString(36)+" ")+"<//div>");
new function(w,b,c,d,o){
d=document;b=d.body;o=b.childNodes;c="className";
b.appendChild(w=d.createElement("div"))[c]= "b";
for(var i=0; i<o.length-1; i++)if(o[i][c]!="w")w.appendChild(o[i]),i--;
(window.onresize = function(){
w.style.width = d.documentElement.clientWidth + "px";
w.style.height = d.documentElement.clientHeight + "px";
})();
<span style="white-space:pre"> </span>}
</script>
<body >
<div class="w" id="mydiv" onmousemove="myshow()" onmouseout="myhide()">
<div class="t">學生信息</div>
<div class="winBody">
學號：<label>0123456789 </label><br><br>
姓名：<label>小明 </label><br><br>
學院：<label>軟件學院 </label><br><br>
專業：<label>軟件工程</label><br><br>
班級：<label>一班</label><br><br>
</div>
</div>
</body>
