<!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>
function OnChange()
{
if (document.all.morw.value == 0)
{
document.all.mwnum1.style.display = "";
document.all.mwnum2.style.display = "none";
}
else
{
document.all.mwnum2.style.display = "";
document.all.mwnum1.style.display = "none";
}
}
</script>
<BODY>
<TABLE border="0" cellpadding="0" cellspacing="0" class="linestyle">
<TR>
<TD align=right>
<SELECT NAME="morw" size="1" onchange="OnChange()">
<option value="0">月份</option>
<option value="1">周数</option>
</SELECT>
</TD>
<TD>
<SELECT NAME="mwnum1" size="1">
<option value="1">1月</option>
<option value="2">2月</option>
<option value="3">3月</option>
<option value="4">4月</option>
<option value="5">5月</option>
<option value="6">6月</option>
<option value="7">7月</option>
<option value="8">8月</option>
<option value="9">9月</option>
<option value="10">10月</option>
<option value="11">11月</option>
<option value="12">12月</option>
</SELECT>
<SELECT NAME="mwnum2" size="1">
<option value="1">第1周</option>
<option value="2">第2周</option>
<option value="3">第3周</option>
<option value="4">第4周</option>
</SELECT>
</TD>
</TR>
</table>
</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>
<script>
function OnChange()
{
if (document.all.morw.value == 0)
{
document.all.mwnum1.style.display = "";
document.all.mwnum2.style.display = "none";
}
else
{
document.all.mwnum2.style.display = "";
document.all.mwnum1.style.display = "none";
}
}
</script>
<BODY>
<TABLE border="0" cellpadding="0" cellspacing="0" class="linestyle">
<TR>
<TD align=right>
<SELECT NAME="morw" size="1" onchange="OnChange()">
<option value="0">月份</option>
<option value="1">周数</option>
</SELECT>
</TD>
<TD>
<SELECT NAME="mwnum1" size="1">
<option value="1">1月</option>
<option value="2">2月</option>
<option value="3">3月</option>
<option value="4">4月</option>
<option value="5">5月</option>
<option value="6">6月</option>
<option value="7">7月</option>
<option value="8">8月</option>
<option value="9">9月</option>
<option value="10">10月</option>
<option value="11">11月</option>
<option value="12">12月</option>
</SELECT>
<SELECT NAME="mwnum2" size="1">
<option value="1">第1周</option>
<option value="2">第2周</option>
<option value="3">第3周</option>
<option value="4">第4周</option>
</SELECT>
</TD>
</TR>
</table>
</BODY>
</HTML>
js or asp ?
楼主的两个select框是相同名字的
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="Microsoft FrontPage 5.0">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>
<script>
function OnChange()
{
if (document.all.morw.value == 0)
{
document.fo.elements[0].style.display = "";
document.fo.elements[1].style.display = "";
document.fo.elements[2].style.display = "none";
}
else
{
document.fo.elements[0].style.display = "";
document.fo.elements[1].style.display = "none";
document.fo.elements[2].style.display = "";
}
}
</script>
<BODY>
<TABLE border="0" cellpadding="0" cellspacing="0" class="linestyle">
<TR>
<TD align=right>
<form name=fo>
<SELECT NAME="morw" size="1" onchange="OnChange()">
<option value="0">月份</option>
<option value="1">周数</option>
</SELECT>
</TD>
<TD>
<SELECT NAME="mwnum" size="1">
<option value="1">1月</option>
<option value="2">2月</option>
<option value="3">3月</option>
<option value="4">4月</option>
<option value="5">5月</option>
<option value="6">6月</option>
<option value="7">7月</option>
<option value="8">8月</option>
<option value="9">9月</option>
<option value="10">10月</option>
<option value="11">11月</option>
<option value="12">12月</option>
</SELECT>
<SELECT NAME="mwnum" size="1">
<option value="1">第1周</option>
<option value="2">第2周</option>
<option value="3">第3周</option>
<option value="4">第4周</option>
</SELECT>
</form>
</TD>
</TR>
</table>
</BODY>
</HTML>
<!--
function Tochoose(obj)
{for(i=formname.mwnum.length-1;i>=0;i--)
document.formname.mwnum.remove(i)
var myoption=documnet.createElement("option")
if(obj.value='0')
for(i=1;i<=12;i++)
{myoption.value=i
myoption.text=i+'月'
document.formname.mwnum.add(myoption)}
else
for(i=1;i<=4;i++)
{myoption.value=i
myoption.text=i+'周'myoption.}
document.formname.mwnum.add(myoption)}
}
//-->
</script>
<TABLE border="0" cellpadding="0" cellspacing="0" class="linestyle">
<TR>
<TD align=right>
<SELECT NAME="morw" size="1" onchange="Tochoose(this)">
<option value="0">月份</option>
<option value="1">周数</option>
</SELECT>
</TD>
<TD>
<SELECT NAME="mwnum" size="1">
</SELECT>
</TD>
</TR>
</table>