var wcmCaptcha = {

	getImageUrl: function(formId)
    {
        var url = wcmSiteURL + 'ajax/controller.php';
        var params = $(formId).serialize(true);
        
        new Ajax.Request(url, {
            parameters: params,
            onSuccess: function(argTransport)
            {
        		setCaptchaImage(argTransport.responseText);
            }
        });
    }
}