function checkContactForm() {
	elements = new Array('firstname', 'lastname', 'email', 'message');
	
	for(var i = 0; i < elements.length; i++) {
		var element = elements[i];
		
		if (document.getElementById(element).value == "") {
			xyz = 'lol';
		}
	}
	alert(xyz);
}

function validate_email(field,alerttxt) {
	with (field) {
		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");
		if (apos<1||dotpos-apos<2) {
			alert(alerttxt);return false;
		} else {
			return true;
		}
	}
}