手机站-南京逗点科技有限公司

例子

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>

<SCRIPT LANGUAGE="JavaScript">
<!--
var pros = new Array("福建","广东");
function f1(){
for(i=0;i<pros.length;i++) {
var obj = document.createElement("option");
obj.text = pros[i];
obj.value = i;
pro.add(obj);
}
}

var a = new Array(2);
a[0] = new Array("福州","厦门","泉州");
a[1] = new Array("广州","深圳","珠海","中山");

function f(){
clear();

var index = document.getElementById("pro").value;
for(i=0;i<a[index].length;i++){
var obj = document.createElement("option");
obj.text = a[index][i];
city.add(obj);
}
}

//清空城市下拉选项
function clear(){
for(i=city.options.length;i>=0;i--){
city.remove(i);
}
}

//-->
</SCRIPT>

</select>省
<SELECT ID="city">
</select>市
</BODY>
</HTML>

多个下拉框的javascript特效