今天寫一個小執行個體，用js和css寫一個可以自動隱藏的懸浮框。css肯定是用來控制樣式的，js用來控制器顯示與隱藏的。顯示與隱藏通常有兩種方法實現：1，用js控制其顯示內容；2，用js控制其大小。
今天要說的就是通過控制其大小來實現元素的顯隱，原理：為其註冊滑鼠移入、移出的事件，當滑鼠移出物件範圍，將其寬度設為1，當滑鼠再次移入該對象，將其寬度還原。很簡單，我們一起看看吧！
隱藏狀態：
左邊那一條窄線就是隱藏以後的懸浮框。
顯示狀態：
當滑鼠滑到左邊的懸浮框上，懸浮框就又顯示出來了。
CSS樣式：
<style>* { font-size:12px; font-family:Verdana,宋體; }html, body { margin:0px; padding:0px; overflow:hidden; }.b { margin:0px; padding:0px; overflow:auto; }.line0 { line-height:20px; background-color:lightyellow; padding:0px 15px; }.line1 { line-height:18px; background-color:lightblue; padding:0px 10px; }.w { position:absolute; lift:10px; top:10px; width:1px; height:300px; overflow:hidden; border:2px groove #281; cursor:default; -moz-user-select:none; }.t { line-height:20px; height:20px; width:160px; overflow:hidden; background-color:#27C; color:white; font-weight:bold; border-bottom:1px outset blue; text-align:center; }.winBody { height:270px; width:160px; overflow-x:auto; overflow-y:auto; border-top:1px inset blue; padding:10px; background-color:white; }</style>
<script type="text/javascript">function myshow(){ //document.getElementById('mydiv').style.display = "none"; document.getElementById('mydiv').style.width = "160px";} //blockfunction myhide(){ //document.getElementById('mydiv').style.display = "block"; document.getElementById('mydiv').style.width="1px"; }//測試用，隨機產生一些內容，便於測試效果。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"; })();</script>
<body ><div class="w" id="mydiv" onmousemove="myshow()" onmouseout="myhide()"><div class="t">學生資訊</div><div class="winBody">學號：<label>0123456789 </label><br><br>姓名：<label>小明 </label><br><br>學院：<label>軟體學院 </label><br><br>專業：<label>軟體工程</label><br><br>班級：<label>一班</label><br><br></div></div></body>
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