js单击输入框后弹出提示信息效果

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta name="keywords" content="站长,网页特效,js特效,广告代码,zzjs,zzjs.net,sky,www.zzjs.net,站长特效 网" />
<meta name="description" content="www.zzjs.net,站长特效网，站长必备js特效及广告代码。大量高质量js特效，提供高质量广告代码下载,尽在站长特效网" />
<title>单击输入框后给出提示效果，sky整理收集。</title>
<style type="text/css">
<!--
body{background:#fff}
.Menu {
 position:relative;
 width:204px;
 height:127px;
 z-index:1;
 background: #FFF;
 border:1px solid #000;
 margin-top:-100px;
 display:none;
}
.Menu2 {
 position: absolute;
 left:0;
 top:0;
 width:100%;
 height:auto;
 overflow:hidden;
 z-index:1;
}
.Menu2 ul{margin:0;padding:0}
.Menu2 ul li{width:100%;height:25px;line-height:25px;text-indent:15px;
             border-bottom:1px dashed #ccc;color:#666;cursor:pointer;
    change:expression(
     this.onmouseover=function(){
       this.style.background="#F2F5EF";
     },
     this.onmouseout=function(){
       this.style.background="";
     }
    )
   }
input{width:200px}
.form{width:200px;height:auto;}
.form div{position:relative;top:0;left:0;margin-bottom:5px}
#List1,#List2,#List3{left:0px;top:93px;}
-->
</style>
<script type="text/javascript">
  function showAndHide(obj,types){
    var Layer=window.document.getElementById(obj);
    switch(types){
   case "show":
     Layer.style.display="block";
   break;
   case "hide":
     Layer.style.display="none";
 }
  }//欢迎来到站长特效网，我们的网址是www.zzjs.net，很好记，zz站长，js就是js特效，本站收集大量高质量js代码，还有许多广告代码下载。
  function getValue(obj,str){
    var input=window.document.getElementById(obj);
 input.value=str;
  }
</script>
</head>
<body>
<a href="<#ZC_BLOG_HOST#>">站长特效网</a>,站长必备的高质量网页特效和广告代码。zzjs.net，站长js特效。<hr>
<!--欢迎来到站长特效网，我们网站收集大量高质量js特效，提供许多广告代码下载，网址：www.zzjs.net，zzjs@msn.com,用.net打造靓站-->
<div class="form">
 <div> Location：<input type="text" id="txt" name="txt" onClick="showAndHide('List1','show');" onblur="showAndHide('List1','hide');"></div>
   <!--列表1-->
   <div class="Menu" id="List1">
   <div class="Menu2">
     <ul>
    <li onmousedown="getValue('txt','站长特效网');showAndHide('List1','hide');">站长特效网</li>
    <li onmousedown="getValue('txt','zzjs.net');showAndHide('List1','hide');">zzjs.net</li>
  </ul>
   </div>
   </div>
<div> Sex：<input type="text" id="txt2" name="txt2" onClick="showAndHide('List2','show');" onblur="showAndHide('List2','hide');"></div>
    <!--列表2-->
   <div class="Menu" id="List2">
   <div class="Menu2">
     <ul>
    <li onmousedown="getValue('txt2','男Male');showAndHide('List2','hide');">男Male</li>
    <li onmousedown="getValue('txt2','女Female');showAndHide('List2','hide');">女Female</li>
  </ul>
   </div>
   </div>
<div> education：<input type="text" id="txt3" name="txt3" onClick="showAndHide('List3','show');" onblur="showAndHide('List3','hide');"></div>
    <!--列表3-->
   <div class="Menu" id="List3">
   <div class="Menu2">
     <ul>
    <li onmousedown="getValue('txt3','大专');showAndHide('List3','hide');">大专</li>
    <li onmousedown="getValue('txt3','本科');showAndHide('List3','hide');">本科</li>
    <li onmousedown="getValue('txt3','硕士');showAndHide('List3','hide');">硕士</li>
    <li onmousedown="getValue('txt3','本科');showAndHide('List3','hide');">本科</li>
  </ul>
   </div>
   </div>
</div>
</body>
</html>
运行效果：