function isPrototypeCaptchaValid(captchaValue)
{
  var result = false;
  var uri = '/eBusiness/services/validation/?captcha=' + encodeURIComponent(captchaValue);
  new Ajax.Request(uri,{
  	asynchronous: false,
	onSuccess: function(transport){				
		if (transport.responseText == 'true') {
			result =  true;
		}		
	}
  });
  return result;
}