<script language='javascript>
function checkup1()//这少了
{
if document.form1.xm.value==''
{
alert('请填写姓名');
document.form1.xm.setfocus;
return false;
}
}
function checkup2()
{
document.getElementById("id").value="1";
form1.submit();
}</script>
<form name='form1' method='post' >
<select name='a' onchange=checkup2()>
<option>1</option>
<option>2</option>
</select>
<select name='b'>
<option>a</option>
<option>b</option>
</select>
<input type=text name='xm' >
<input type=hidden name='id'
<input type=submit name='ok' onclick='return checkup1();'>
</form>
function checkup1()//这少了
{
if document.form1.xm.value==''
{
alert('请填写姓名');
document.form1.xm.setfocus;
return false;
}
}
function checkup2()
{
document.getElementById("id").value="1";
form1.submit();
}</script>
<form name='form1' method='post' >
<select name='a' onchange=checkup2()>
<option>1</option>
<option>2</option>
</select>
<select name='b'>
<option>a</option>
<option>b</option>
</select>
<input type=text name='xm' >
<input type=hidden name='id'
<input type=submit name='ok' onclick='return checkup1();'>
</form>
onchange=checkup2()>
出错啊
<input type=hidden name='id'class="id">
<input type=submit name='ok' onclick='return checkup1();'>
这行不对
document.form1.xm.focus();