function formCheck(frm) {
			usr = frm.elements['username'];
		    if (usr.value == 0){
		        alert ("Please enter your username.");
		        usr.focus();
		        return false;
		    }
			pwd = frm.elements['password'];
		    if (pwd.value == 0){
		        alert ("Please enter your password.");
		        pwd.focus();
		        return false;
		    }
		}