javascript实现省市联级
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML>
<HEAD>
<TITLE>省市联级</TITLE>
<script language='javascript'>
function selCity(){
varprv1=new Array();
prv1["四川"]=["成都","绵阳","都江堰","泸州","攀枝花"];
prv1["湖南"]=["长沙","株洲","衡阳","郴州","张家界","岳阳"];
var selPrv=document.myform.prv.value;
document.myform.city.options.length=0
if(selPrv=="请选择省份"){
document.myform.city.options.add(new Option("请选择省份"));
}else{
for(var i in prv1){
var opvity=new Option(prv1,prv1)
document.myform.city.options.add(opvity);
}
}
}
</script>
</HEAD>
<BODY>
<form name='myform' method='post' action='' >
请选择省份：
<select name='prv' id='prv' onChange='selCity()'>
<option value='请选择省份'>请选择省份</option>
<option value='四川'>四川</option>
<option value='湖南'>湖南</option>
<option value='广东'>广东</option>
<option value='江苏'>江苏</option>
<option value='湖北'>湖北</option>
</select>
请选择城市：
<select name='city' id='city'>
<option value='请选择城市'>请选择城市</option>
</select>
</form>
</BODY>
</HTML>
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