function Validate(login){
		
			if (login.user.value.length == 0){
			  alert("Please type in your username.");
			  login.user.focus();
		         return false ;
		    }
		    if (login.pwd.value.length == 0){
			  alert("Please type in your password.");
			  login.pwd.focus();
		         return false ;
		    }
		 }