var errorText = 'Please specify fields marked in red.';

function trim(str, charlist) {
    var whitespace, l = 0, i = 0;
    str += '';

    if (!charlist) {
        // default list
        whitespace = " \n\r\t\f\x0b\xa0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000";
    } else {
        // preg_quote custom list
        charlist += '';
        whitespace = charlist.replace(/([\[\]\(\)\.\?\/\*\{\}\+\$\^\:])/g, '$1');
    }

    l = str.length;
    for (i = 0; i < l; i++) {
        if (whitespace.indexOf(str.charAt(i)) === -1) {
            str = str.substring(i);
            break;
        }
    }

    l = str.length;
    for (i = l - 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 : '';
}

function empty(mixed_var ) {
    var key;

    if (mixed_var === "" ||
        mixed_var === 0 ||
        mixed_var === "0" ||
        mixed_var === null ||
        mixed_var === false ||
        mixed_var === undefined
    ){
        return true;
    }

    if (typeof mixed_var == 'object') {
        for (key in mixed_var) {
            return false;
        }
        return true;
    }

    return false;
}

function validate(form, custom) {

	var error = false;

	$('#' + form + ' [rel = required]').each(function() {
		if (empty($(this).val())) {

			error = true;

			$('[rel = ' + $(this).attr('id') + ']').addClass('red');
		}
	});

	if (typeof custom == 'function')
		custom();

	if (error) {
		error = false;

		return false;
	} else {
		error = false;

		return true;
	}

}