javascript 二级联动 

<html> 
<head> 
<title></title> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 

<style> 
body,select 
{ 
font-size:9pt; 
font-family:Verdana; 
} 
a 
{ 
color:red; 
text-decoration:none; 
} 
a:hover{ 
text-decoration:underline; 
} 
</style> 
<SCRIPT LANGUAGE="JavaScript"> 
<!-- 
function Dsy() 
{ 
this.Items = {}; 
} 
Dsy.prototype.add = function(id,iArray) 
{ 
this.Items[id] = iArray; 
} 
Dsy.prototype.Exists = function(id) 
{ 
if(typeof(this.Items[id]) == "undefined") return false; 
return true; 
} 

function change(v){ 
var str="0"; 
for(i=0;i<v;i++){ str+=("_"+(document.getElementById(s[i]).selectedIndex-1));}; 
var ss=document.getElementById(s[v]); 
with(ss){ 
length = 0; 
options[0]=new Option(opt0[v],opt0[v]); 
if(v && document.getElementById(s[v-1]).selectedIndex>0 || !v) 
{ 
if(dsy.Exists(str)){ 
ar = dsy.Items[str]; 
for(i=0;i<ar.length;i++)options[length]=new Option(ar[i],ar[i]); 
if(v)options[1].selected = true; 
} 
} 
if(++v<s.length){change(v);} 
} 
} 

var dsy = new Dsy(); 

dsy.add("0",["1","2","3","4"]); 

dsy.add("0_0",["11","12","13"]); 
dsy.add("0_1",["21","22","23"]); 
dsy.add("0_2",["31","32","33"]); 
dsy.add("0_3",["41","42","43"]); 

//--> 
</SCRIPT> 
<SCRIPT LANGUAGE = JavaScript> 

var s=["s1","s2"]; 
var opt0 = ["请选择","请选择"]; 
function setup() 
{ 
for(i=0;i<s.length-1;i++) 
document.getElementById(s[i]).onchange=new Function("change("+(i+1)+")"); 
change(0); 
} 
//--> 
</SCRIPT> 
</head> 
<body bgcolor="#E0E0E0" onload="setup()"> 

<form name="frm" action="11.jsp"> 
<select id="s1" name="s1"><option></option></select> 
<select id="s2" name="s2"><option></option></select> 
<input type="submit" name="Submit" value="提交"> 
</form> 
</body> 
</html> 

------
11.jsp

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
String s1 = request.getParameter("s1");
String s2 = request.getParameter("s2");
out.println(s1);
out.println(s2);

%>
</body>
</html>

--------------------------



yinyong:http://zhidao.baidu.com/question/74257440.html
posted @ 2013-07-23 22:46  meimao5211  阅读(191)  评论(0)    收藏  举报