请问高手这样可以吗？？

[mcu163]

<script>
function aa()
{
if otype.id==1
document.form1.action="search.asp"
else
document.form1.action="../sea/search.asp"
}
</script>
<form name="form1" method="get">
<tr>
<td height="24" align="center" bgcolor="#FFFFFF">
<input type="text" name="key" size="19" class="input">
</td>
</tr>
<tr>
<td height="24" align="center" bgcolor="#FFFFFF">
<select name="otype" class="input">
<option id="1" value="title" selected class="input">信息标题</option>
<option id="2" value="msg" class="input">信息内容</option>
</select>
<input type="button" name="Submit" value="搜索" onclick="aa()" class="input">
</td>
</tr>
</form>


但运行提示：错误，哪里有错？怎样改呢？谢谢

[叮咚叮咚叮叮咚]

<form name="form1" method="post">
<input type="submit" name="Submit" value="搜索" onclick="aa()" class="input">

或者aa里面要写上form1.submit()

[klend]

function aa()
{
if(document.form1.otype.value=="msg")
document.form1.action="search.asp";
else
document.form1.action="../sea/search.asp";
}

[叮咚叮咚叮叮咚]

<script>
function aa()
{
if(document.form1.otype.id==1)
{document.form1.action="search.asp"}
else
{document.form1.action="../sea/search.asp"}
}
</script>

[叮咚叮咚叮叮咚]

<script>
function aa()
{
if(document.form1.otype.id==1)
{document.form1.action="search.asp"}
else
{document.form1.action="../sea/search.asp"}
document.form1.submit();
}
</script>