batch check for blank form fields

function checkForEmptyFields (elIdArray) {
	var returnVal = true;
	var returnMsg = [];
 
	elIdArray.each( function(elId) {
		var el = $(elId);
		if (el.value.blank() === true) {
			returnVal = false;
			returnMsg.push("The element '" + el.name + "' cannot be blank.");
		} else {}
	});
 
	return [returnVal, returnMsg];
}
 
 
var checkFields = checkForEmptyFields(["firstName", "lastName", "userEmail"]);
 
if (checkFields[0] === false) {
	alert(checkFields[1]);
}
else {
	$("updateProfile").submit();
}