<script language="JavaScript">
<!--
var subcat = new Array();
subcat[0] = new Array('直辖市','北京')
subcat[1] = new Array('直辖市','上海')
subcat[2] = new Array('直辖市','天津')
subcat[3] = new Array('直辖市','重庆')
subcat[4] = new Array('河北','石家庄')
subcat[5] = new Array('河北','保定')
subcat[6] = new Array('河北','张家口')
subcat[7] = new Array('河北','承德')
subcat[8] = new Array('河北','唐山')
subcat[9] = new Array('河北','廊坊')
subcat[10] = new Array('河北','沧州')function changeselect1(locationid)
{
document.form1.city.length = 0;
document.form1.city.options[0] = new Option('==请选择市==','');
for (i=0; i<subcat.length; i++)
{
if (subcat[i][0] == locationid)
{document.form1.city.options[document.form1.city.length] = new Option(subcat[i][1], subcat[i][2]);}
}
}
//-->
</script>列表：
<select name="state" onChange="changeselect1(this.value)">
<option value="">==请选择省==</option>
<option value="直辖市">直辖市</option>
<option value="河北">河北</option>
</select>
<select name="city" >
<option value="">==请选择市==</option>
</select>
<script language="JavaScript">function validate(theform)
{//alert(document.all.city.value);if (document.all.city.value == "")
{
alert("城市值非空");
return false;
}else{
return true;
}
}
</script>
<form method="post" name="form1" action="#" enctype="multipart/form-data" onSubmit="return validate(this)">
<tr>
<td bgcolor="#F8F8F8" width="20%">选择城市:</td>
<td bgcolor="#FFFFFF"><select name="city"onChange=changelocation(this.value)>
<option value="" selected>>>>>请选择<<<<</option>
<OPTION value='1' >北京</OPTION><OPTION value='2' >上海</OPTION><OPTION value='3' >湖南 </OPTION>
</select></td>
</tr>
<tr>
<td bgcolor="#F8F8F8" width="20%">选择市或者城区:</td>
<td bgcolor="#FFFFFF"> <select name="area">
<SCRIPT language=JavaScript>
var onecount;
onecount=0;
subcat = new Array();
subcat[0] = new Array(1,'东城');
subcat[1] = new Array(1,'西城');
subcat[2] = new Array(1,'丰台');
subcat[3] = new Array(1,'海淀');
subcat[4] = new Array(1,'通州');
subcat[5] = new Array(1,'其它区');
subcat[6] = new Array(2,'奉贤');
subcat[7] = new Array(2,'南汇');
subcat[8] = new Array(2,'青浦');
subcat[9] = new Array(2,'松江');
subcat[10] = new Array(2,'徐汇');
subcat[11] = new Array(2,'浦东');
subcat[12] = new Array(3,'长沙');
subcat[13] = new Array(3,'永州');
subcat[14] = new Array(3,'衡阳');
onecount=15;
function changelocation(locationid)
{
document.all.area.length = 0;
var locationid=locationid;
var i,flag=0;
for (i=0;i < onecount; i++)
{
if (subcat[i][0] == locationid)
{
document.all.area.options[document.all.area.length] = new Option(subcat[i][1]);
flag=1;
}
}
if (flag==0)
{document.all.options.options[document.all.area.length] = new Option('>>>>选择市或者区<<<<');
}
}</SCRIPT>
<option value="" selected>>>>>选择市或者区<<<<</option>
</select></td>
</tr>
<input type="submit" name="topicsubmit" value="提交" tabindex="5">
</form>
一三级连动下拉地区
<html>
<head>
<script language=javascript>
var arr="浙江|江苏|安徽|江西";var arr0 = "杭州|宁波|温州|绍兴"; //这些数据可以从数据库中取得
var arr1 = "南京|苏州|无锡|常州";
var arr2 = "合肥|翕县|黄山|祁门";
var arr3 = "南昌|九江|赣州|上饶"; var arr00 = "杭州A区|杭州B区";
var arr01 = "宁波A区|宁波B区";
var arr02 = "温州A区|温州B区";
var arr03 = "绍兴A区|绍兴B区"; var arr10 = "南京A区|南京B区";
var arr11 = "苏州A区|苏州B区";
var arr12 = "无锡A区|无锡B区";
var arr13 = "常州A区|常州B区"; var arr20 = "合肥A区|合肥B区";
var arr21 = "翕县A区|翕县B区";
var arr22 = "黄山A区|黄山B区";
var arr23 = "祁门A区|祁门B区"; var arr30 = "南昌A区|南昌B区";
var arr31 = "九江A区|九江B区";
var arr32 = "赣州A区|赣州B区";
var arr33 = "上饶A区|上饶B区"; //alert(eval("arr"+2+1));
function AddOptions(dltObj,arrObj)
{
dltObj.innerHTML="";
var arrLocation=arrObj.split("|");
for(var i=0;i<arrLocation.length;i++){
var opt=document.createElement("OPTION");
dltObj.add(opt);
opt.value=i;
opt.text=arrLocation[i];
}
}
function ShowValue(){
var dltAr=document.getElementById("dltArea");
var hidId=document.getElementById("OutValue");
var txtText=document.getElementById("txtOutText");
hidId.value=dltAr.options[dltAr.selectedIndex].value;
txtText.value=dltAr.options[dltAr.selectedIndex].text;}
function init(){
AddOptions(dltProvince,eval('arr'));
AddOptions(dltCity,eval('arr'+dltProvince.selectedIndex));
AddOptions(dltArea,eval('arr'+dltProvince.selectedIndex+dltCity.selectedIndex));
ShowValue();
}
</script>
</head>
<body onLoad="init();">
<table width="300" cellpading="0" cellspacing="0" border="2">
<tr>
<td width="100"><select id="dltProvince" onchange="AddOptions(dltCity,eval('arr'+dltProvince.selectedIndex));AddOptions(dltArea,eval('arr'+dltProvince.selectedIndex+dltCity.selectedIndex));ShowValue();" style="width:100%"></select>
</td>
<td width="100"><select id="dltCity" onchange="AddOptions(dltArea,eval('arr'+dltProvince.selectedIndex+dltCity.selectedIndex));ShowValue();" style="width:100%"></select>
</td>
<td width="100"><select id="dltArea" style="width:100%" onchange="ShowValue()"></select></td>
<td width="100">
<input type="hidden" id="OutValue" value="">
<input type="text" id="txtOutText" style="width:100%">
</td>
</tr>
</table>
</body>
</html>
虽然今天才看到hunterxing2()兄的留言，但还是万分感谢兄弟的支持，本人还是菜鸟，望以后各位大哥能够多多帮忙，谢谢