function CheckClientValidation(frm)

{

	if(frm.Username.value==""){

			alert("Field required: Username.");

			frm.Username.focus();

			return false;

		}

		

		if(frm.Password.value==""){

			alert("Field required: Password.");

			frm.Password.focus();

			return false;

		}

		

		if(frm.Username.value!="" || frm.Password.value!=""){

			alert('Username and password do not match.');

		}

}