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ajax级联

<%@ page language="java"contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<Meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">

<title>Inserttitle here</title>

</head>

<script type="text/javascript" src="js/jquery-1.7.2.min.js"></script>

<script type="text/javascript">

functionshowDev(){

var pro = $("#provin").val();

alert(pro);

var cc = document.getElementById("city");

var city ;

var city1 = ["长沙","张家界","阳"];

var city2 = ["朝阳","海淀"];

var city3 = ["广州","深圳"];

var city4 = ["黄冈","武汉"];

switch(parseInt(pro)){

case 1:city=city1;break;

case 2:city=city2;break;

case 3:city=city3;break;

case 4:city=city4;break;

}

clearOptions(cc);

for(vari=0;i<city.length;i++){

var opt= document.createElement("option");

opt.text = city[i];

opt.value = i;

cc.options.add(opt);

}

}

functionclearCity(citysi){

for(vari=citysi.length;i>-1;i--){

citysi.options.remove(i);

}

}

functionclearOptions(selected)

{

alert("进入清理杂项");

for( vari=selected.options.length;i>-1;i--)

{

selected.options.remove(i);

}

}

</script>

<body>

<h3>Ajax@H_501_404@级联实例</h3>

省份:<select id="provin" onchange="showDev();">

<option value="1">湖南</option>

<option value="2">北京</option>

<option value="3">广东</option>

<option value="4">湖北</option>

</select>

市:<select id="city">

<option value="0">武汉</option>

</select>

</body>

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