怎么提交不了？帮忙看看哈。。实在是每分了~~

<html>
<head>
<script Language="javascript">
<!--

function  enternext() 
{   
   if(window.event.keyCode==13) {
window.event.keyCode=9;
}
   }   

-->
</SCRIPT>
</head>
<body>
<form name="form1" METHOD="POST" ACTION="#">
<table align="center" border="0" cellpadding="0" cellspacing="0"
width="100%">
<tr>
<td align="center">
<font size="3"><B>投递信息录入</B> </font>
</td>
</tr>
<tr>
<td align="center">
&nbsp;
</td>
</tr>
<tr>
<td align="center">
<hr width="100%" color="#EFF7FF">
</td>
</tr>
</table>
<table align="center" border="0" cellpadding="0" cellspacing="0">
<tr>
<td align="center" colspan="2">
&nbsp;
</td>
</tr>
<tr>
<td>
送货单编号：
</td>
<td>
<input type="text" name="shdbh" onkeydown="enternext()">
</td>
</tr>
<tr>
<td align="center" colspan="2">
&nbsp;
</td>
</tr>
<tr>
<td>
实收金额：
</td>
<td>
<input type="text" name="ssje" size="11" onkeydown="enternext()">
</td>
</tr>
<tr>
<td align="center" colspan="2">
&nbsp;
</td>
</tr>
<tr>
<td>
送货日：
</td>
<td>
<select name="n" onkeydown="enternext()">
<option value="1">
2009
</select>
<select name="y" onkeydown="enternext()">
<option value="1">
01
<option value="2">
02
</select>
<select name="r" onkeydown="enternext()">
<option value="1">
01
<option value="2">
22
</select>
</td>
</tr>
<tr>
<td align="center" colspan="2">
&nbsp;
</td>
</tr>
<tr>
<td>
送货与否：
</td>
<td>
<input type="radio" name="issh" value="yes" checked
onkeydown="enternext()">
是
<input type="radio" name="issh" value="no" onkeydown="enternext()">
否
</td>
</tr>
<tr>
<td align="center" colspan="2">
&nbsp;
</td>
</tr>
<tr>
<td align="center" colspan="2">
&nbsp;
</td>
</tr>
<tr>
<td align="center">
&nbsp;
</td>
<td>
<input type="button" name="submit" value="确定"
onkeydown="javascript:submit();">
&nbsp;&nbsp;
<input type="reset" name="reset" value="重置">
</td>
</tr>
</table>
</form>
</body>
</html>