<!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><BODY>
<select name=1 onchange="test();">
<option value="aaa">aaa</option>
<option value="bbb">bbb</option>
<option value="ccc">ccc</option>
</select>
还有另外一个下拉列表框:
<select name=2>
</select>
<script>
function test(){
if(document.all('1').value=="aaa"){
document.all('2').options.add(new Option(111,111));
document.all('2').options.add(new Option(222,222));
document.all('2').options.add(new Option(333,333));
}
if(document.all('1').value=="bbb"){
document.all('2').options.add(new Option(333,333));
document.all('2').options.add(new Option(444,444));
document.all('2').options.add(new Option(555,555));
}
if(document.all('1').value=="ccc"){
document.all('2').options.add(new Option(666,666));
document.all('2').options.add(new Option(777,777));
document.all('2').options.add(new Option(888,888));
}
}
</script>
</BODY>
</HTML>
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD><BODY>
<select name=1 onchange="test();">
<option value="aaa">aaa</option>
<option value="bbb">bbb</option>
<option value="ccc">ccc</option>
</select>
还有另外一个下拉列表框:
<select name=2>
</select>
<script>
function test(){
if(document.all('1').value=="aaa"){
document.all('2').options.add(new Option(111,111));
document.all('2').options.add(new Option(222,222));
document.all('2').options.add(new Option(333,333));
}
if(document.all('1').value=="bbb"){
document.all('2').options.add(new Option(333,333));
document.all('2').options.add(new Option(444,444));
document.all('2').options.add(new Option(555,555));
}
if(document.all('1').value=="ccc"){
document.all('2').options.add(new Option(666,666));
document.all('2').options.add(new Option(777,777));
document.all('2').options.add(new Option(888,888));
}
}
</script>
</BODY>
</HTML>
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD><BODY>
<select name=1 onchange="test();">
<option value="aaa">aaa</option>
<option value="bbb">bbb</option>
<option value="ccc">ccc</option>
</select>
还有另外一个下拉列表框:
<select name=2>
</select>
<script>
function test(){
if(document.all('1').value=="aaa"){
document.all('2').length=0
document.all('2').options.add(new Option(111,111));
document.all('2').options.add(new Option(222,222));
document.all('2').options.add(new Option(333,333));
}
if(document.all('1').value=="bbb"){
document.all('2').length=0
document.all('2').options.add(new Option(333,333));
document.all('2').options.add(new Option(444,444));
document.all('2').options.add(new Option(555,555));
}
if(document.all('1').value=="ccc"){
document.all('2').length=0
document.all('2').options.add(new Option(666,666));
document.all('2').options.add(new Option(777,777));
document.all('2').options.add(new Option(888,888));
}
}
</script>
</BODY>
</HTML>