function __construct()
{
    var form = $('contactForm');

    var captchaChangeLink = $('linkGenerateNewCaptchaImg');
        
    var captchaOnClick = function(event)
    {
        CaptchaCode.replaceCaptchaImage(form.publicCode.value, form);
        event.preventDefault();
    }
    
    if(captchaChangeLink)
    {
        captchaChangeLink.addEvent("click", captchaOnClick.handler(this));
    }
}