html css下拉 菜单

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<!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=utf-8" />
<title>无标题文档</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";
 }
  }
  
function getValue(obj,str){
    
var input=window.document.getElementById(obj);
 input.value
=str;
  }
</script>
</head>
<body>
<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','中国CHINA');showAndHide('List1','hide');">中国CHINA</li>
    
<li onmousedown="getValue('txt','美国USA');showAndHide('List1','hide');">美国USA</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>