function checkform()
{
	if (document.form.user_id.value=="")
		{
		alert('Please Enter Your Username')
		document.form.user_id.focus();
		return false;
		}
	if (document.form.password.value=="")
		{
		alert('Please Enter Your Password')
		document.form.password.focus();
		return false;
		}
		
		document.form.submit();
}