function isValidEmailAddress(emailAddress) 
{  
	var pattern = new RegExp(/^(("[\w-\s]+")|([\w-]+(?:\.[\w-]+)*)|("[\w-\s]+")([\w-]+(?:\.[\w-]+)*))(@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$)|(@\[?((25[0-5]\.|2[0-4][0-9]\.|1[0-9]{2}\.|[0-9]{1,2}\.))((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\.){2}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\]?$)/i);  
	return pattern.test(emailAddress);  
}

function checkInput(element) {
	var txt = $(element).val();
	txt = trim(txt);
	if (txt.length < 1) {
		$(element).css("border","1px #fe6161 solid");
		alert("Dit veld is nog leeg.");
	} else {
		$(element).css("border","1px #cccccc solid");
	}
}

function checkEmail(element) {
	var email = $(element).val();
	email = trim(email);
	if (!isValidEmailAddress(email)) {
		$(element).css("border","1px #fe6161 solid");
		alert("Het ingevoerde e-mail adres is niet valide.");
	} else {
		$(element).css("border","1px #cccccc solid");
	}
}

function trim (str) {
	var whitespace = ' \n\r\t\f\x0b\xa0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000';
	for (var i = 0; i < str.length; i++) {
		if (whitespace.indexOf(str.charAt(i)) === -1) {
			str = str.substring(i);
			break;
		}
	}
	for (i = str.length - 1; i >= 0; i--) {
		if (whitespace.indexOf(str.charAt(i)) === -1) {
			str = str.substring(0, i + 1);
			break;
		}
	}
	return whitespace.indexOf(str.charAt(0)) === -1 ? str : '';
}