var request;
var queryString;

function countClick(url){
  httpRequest("GET",url,true);
}

function handleCheck(){
  if(request.readyState == 4){
    if(request.status == 200 || request.status == 301 || request.status == 302 || request.status == 404){
    } else {
    }
  }
}

function initReq(reqType,url,bool){
  request.onreadystatechange=handleCheck;
  request.open(reqType,url,bool);
  request.setRequestHeader("Content-Type",
          "application/x-www-form-urlencoded; charset=UTF-8");
  request.send(queryString);
}


function httpRequest(reqType,url,asynch){
  //Mozilla-based browsers
  if(window.XMLHttpRequest){
    request = new XMLHttpRequest();
  } else if (window.ActiveXObject){
    request=new ActiveXObject("Msxml2.XMLHTTP");
    if (! request){
      request=new ActiveXObject("Microsoft.XMLHTTP");
    }
   }
  //the request could still be null if neither ActiveXObject
  //initializations succeeded
  if(request){
    initReq(reqType,url,asynch);
  }
  else {
    alert("Your browser does not permit the use of all "+
        "of this application's features!");
  }
}

function setQueryString(){
  queryString="";
  var frm = document.forms[0];
  var numberElements =  frm.elements.length;
  for(var i = 0; i < numberElements; i++)  {
    if(i < numberElements-1)  {
      queryString += frm.elements[i].name+"="+
        encodeURIComponent(frm.elements[i].value)+"&";
    } else {
      queryString += frm.elements[i].name+"="+
        encodeURIComponent(frm.elements[i].value);
    }
  }
}