function validate_login()	{
	var a=document.getElementById("Username")
	if (a.value=="")	{
		alert("Enter a username");
		document.frmlogin.Username.focus();
		return false;
		}
	var a=document.getElementById("Password")
	if (a.value=="")	{
		alert("Enter a password");
		document.frmlogin.Password.focus();
		return false;
		}
}
function check_submit(e)	{
	if(window.event) // IE
		{
		keynum = e.keyCode;
		}
	else if(e.which) // Netscape/Firefox/Opera
		{
		keynum = e.which;
		}
	if (keynum==13)
		if (validate_login()!=false)
			document.frmlogin.submit();
}