Restricting spaces in textbox using JavaScript.

<script type = "text/javascript">
        function DisableSpace() 
        {
            if (event.keyCode == 32) 
            {
                event.returnValue = false;
                return false;
            }
        }
</script>

<asp:TextBox ID = "txtLoginID" onkeypress = "return DisableSpace();" runat = "server"></asp:TextBox>