function verifyCaptcha(captcha_id, captcha_value){
	captcha_verified = false;
    new Ajax.Request('/captcha/', {
        asynchronous:false,
        evalScripts:false,
        onComplete:function(request, json){alrt = json; captcha_verified = (json == 'OK')},
        parameters: 'captcha_id='+$(captcha_id).value+'&captcha='+$(captcha_value).value  
    })
    //alert(alrt);
	return captcha_verified;
}