$(document).ready(function () {
    $('.cancel').click(function () {
        $('.sign-up').slideUp();
    });
});

function customAlert(message) {
    if (typeof message === 'undefined') {
        message = '';
    }

    var alertDiv = document.createElement('div');
    alertDiv.className = 'alert';

    var messageDiv = document.createElement('div');
    messageDiv.className = 'message';
    messageDiv.innerHTML = message;
    alertDiv.appendChild(messageDiv);

    var buttonsDiv = document.createElement('div');
    buttonsDiv.className = 'buttons';

    var okButton = document.createElement('button');
    okButton.setAttribute('onclick', "javascript: $.modal.close();"); 
    okButton.innerHTML = 'Ok';
    buttonsDiv.appendChild(okButton);

    alertDiv.appendChild(buttonsDiv);

    $.modal(alertDiv, {
        overlayClose: true,
        position: ['30%']
    });
}

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);
};