NSOA: Perform a simple URL validation on a custom field

validateURL.js

/**
 * Simple url validation for custom field.
  *
 * Version    Date            Author           Remarks
 * 1.00       20 Feb 2014     Ryan Morrissey
 *
 */
function validateURL() {
    var url = NSOA.form.getValue('custom_30'),
        re = /^(ftp|http|https):\/\/[^ "]+$/,
        test = re.test(url);

    if (!test) {
        var errMsg = '' +
            'Invalid URL. Ensure you use ftp/http/https ' +
            ' and remove any spaces or double quotes.' +
            '';
        NSOA.form.error('custom_30', errMsg);
    }
}