function onSubmitLogin()
{
    var myForm = document.frmLogin;
    if(isEmpty(myForm.sUserId.value))
    {
    	alert("Please enter a User ID.");
    	return false;
    }
    if(isEmpty(myForm.sPassword.value))
    {
    	alert("Please enter a password.");
    	return false;
    }
    
    myForm.submit();   
}