jQuery提交表单没反应，求帮助


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title></title>
<link href="../css/all.css" rel="stylesheet" type="text/css" />
<link href="css/style.css" rel="stylesheet" type="text/css" /> 
<script src="../js/jquery-1.3.2.min.js" type="text/javascript"></script>
<script src="../js/core/base.js" type="text/javascript"></script>
<script src="../js/plugins/ligerForm.js" type="text/javascript"></script>
<script src="../js/plugins/ligerDateEditor.js" type="text/javascript"></script>
<script src="../js/plugins/ligerComboBox.js" type="text/javascript"></script>
<script src="../js/plugins/ligerCheckBox.js" type="text/javascript"></script>
<script src="../js/plugins/ligerButton.js" type="text/javascript"></script>
<script src="../js/plugins/ligerDialog.js" type="text/javascript"></script>
<script src="../js/plugins/ligerRadio.js" type="text/javascript"></script>
<script src="../js/plugins/ligerSpinner.js" type="text/javascript"></script>
<script src="../js/plugins/ligerTextBox.js" type="text/javascript"></script> 
<script src="../js/plugins/ligerTip.js" type="text/javascript"></script>
<script src="js/jquery.metadata.js" type="text/javascript"></script>
<style type="text/css">
body{ font-size:12px;}
.l-table-edit {}
.l-table-edit-td{ padding:6px;}
.l-button-submit,.l-button-test{width:80px; float:left; margin-left:10px; padding-bottom:2px;}
</style>
<script type="text/javascript">
$(function ()
{
$.metadata.setType("attr", "validate");
$("form").ligerForm();
});
function validata(){
     reg=/^[0-9a-zA-Z\u4E00-\u9FA5]+$/;   
      if(!reg.test($("#MenuName").val())){   
       alert("栏目名称填写不正确！");  
return false; 
      }else{
   return true;
  }
  $("form").submit();
}
-->
</script>
</head><body style="padding:10px"><form name="form1" method="post" action="menu_add.asp" id="form1">
<div>
</div>
<table width="500" cellpadding="0" cellspacing="0" class="l-table-edit" >
    <tr>
        <td width="70" align="left" class="l-table-edit-td">栏目名称：</td>
        <td align="left" class="l-table-edit-td"><input name="MenuName" type="text" id="MenuName" ltype="text"/></td>
        <td align="left"></td>
    </tr>
    <tr>
        <td align="left" class="l-table-edit-td">所属栏目：</td>
        <td align="left" class="l-table-edit-td">
        <select name="ParentID" id="ParentID" ltype="select">
          <option value="0">一级栏目</option>
  </select>
        </td>
    </tr>
  </table>
 <br />
<input type="Button" value="提交" id="Button1" class="l-button l-button-submit" onclick="validata()"/> 
</form>
</body>
</html>把按扭type改为Submit就可以提交为什么用$("form").submit()会没反应