PROBLEM IN FORM VALIDTION

i applied validation IN THIS JSP PAGE.if i leave username/password empty,i will be promped to enter those to feilds.but the PROBLEM is that after i press OK on validation prompt,the page goes to 2_control.jsp.I WANT IT TO GO TO NXT PAGE ONLY IF the validation thing is ok,not otherwise.plz hlp.

Hi. Here is my code:

<html>
<head>
<script>
function validLogin(){
if (document.form.userName.value == ""){
alert ( "Please enter Login Name." );
document.loginform.userName.focus();
return false;
}
if (document.form.password.value == ""){
alert ( "Please enter password." );
document.userform.password.focus();
return false;
}
alert ( "Welcome User" );
return true;
}
</script>
</head>
<body>
<form name="form" method="post" action="2_control.jsp" onsubmit="return validLogin();">
<table width="250px" border=0 style="background-color:ffeeff;">
<tr><td colspan=2 align="center" style="font-weight:bold;font-size:20pt;" align="center">User Login</td>
</tr>
<tr><td colspan=2>�</td>
</tr>
<tr><td style="font-size:12pt;" align="center">Login Name:</td>
<td><input type="text" name="userName" value=""></td>
</tr>
<tr><td style="font-size:12pt;" align="center">Password:</td>
<td><input type="password" name="password" value=""></td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="Submit" value="Login"></td>
</tr>
</table>
</form>
</body>
</html>

Thanks.

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