JS三级联动菜单，页面刷新后怎么保持之前选择的项目
日期：2014-05-18 浏览次数：20806 次
JS三级联动菜单，页面刷新后如何保持之前选择的项目？
- HTML code
<%@ Page Language="C#" AutoEventWireup="true" EnableEventValidation="false" CodeFile="Default6.aspx.cs" Inherits="Default6" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!--更新日期2010-6-7-->
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>AjaxTest </title>
</head>
<body>
<form id="form1" runat="server">
<td width=130px>始发地<select id="s1" name = "nm1" runat = server style="width:178px;" onchange = "getAddrs()"></select>
<select id="s2" runat = server name = "nm2" style="width:178px;" onchange = "getAddrs()"></select>
<select id="s3" runat = server name = "nm3" style="width:178px;" onchange = "getAddrs()"></select></td>
<td width=130px align=right>目的地</td><br />
<td width=130px><select id="sn1" name = "nm4" runat = server style="width:178px;" onchange = "getAddrs()"></select>
<select id="sn2" name = "nm5" runat = server style="width:178px;" onchange = "getAddrs()"></select>
<select id="sn3" name = "nm6" runat = server style="width:178px;" onchange = "getAddrs()"></select></td>
</form>
</body>
<script language="javascript" type="text/javascript">
function LianDong(arr, sel)
{
this.GetCnNameByValue = function(val)
{
for ( var j = 0; j < arr.length; j++)
{
if (arr[j][0] == val)
{
return arr[j][2];
}
}
return "";
}
this.GetValueByCnName = function(val)
{
for ( var j = 0; j < arr.length; j++)
{
if (arr[j][2] == val)
{
return arr[j][0];
}
}
return "";
}
var me = this;
this.$ = function(o)
{
return document.getElementById(o);
}
this.sub = function (i, pid)
{
for (var j=i+1; j<sel.length; j++)
{
me.$(sel[j]).length = 0;
me.$(sel[j]).options[0] = new Option("请选择省,直辖市", "");
if(j=0)
{
me.$(sel[j]).options[0] = new Option("请选择省,直辖市", "");
}
if(j=1)
{
me.$(sel[j]).options[0] = new Option("市,直辖市", "");
}
if(j=2)
{
me.$(sel[j]).options[0] = new Option("县", "");
}
}
for ( var j = 0; j < arr.length; j++)
{
if (arr[j][1] == pid)
{
me.$(sel[i+1]).options[me.$(sel[i+1]).length] = new Option(arr[j][2], arr[j][0]);
}
}
}
this.init = function()
{
me.sub(-1,"root");
for (var i=0; i<sel.length-1; i++)
{
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