function getHTTPObject(){

      if (window.ActiveXObject) return new ActiveXObject("Microsoft.XMLHTTP");

      else if (window.XMLHttpRequest) return new XMLHttpRequest();

      else {

      alert("Your browser does not support AJAX.");

      return null;
  
      }
  
  
      }


	  function getCaptcha(code){
      httpObject = getHTTPObject();
	  
      if (httpObject != null) {
      
	      httpObject.open("GET", "captcha/captcha.php?c="+code, true);
	
	      httpObject.send(null);
	      httpObject.onreadystatechange = setError;
	
	      }

      }
      
      function setError(){

      if(httpObject.readyState == 4){
      	document.getElementById('capt').value = httpObject.responseText;

      }
            
      }