Ajax Model

gistfile1.txt

var AjaxTime = 10000;
var AjaxPath = {
    requestFile: "ajaxPath"
};
 
var AjaxController = function(){};
AjaxController.prototype ={
  createHttpRequest: function() {
    try {
      return newXMLHttpRequest();
    } catch(e){}
  },

  ajaxError: function() { return; },
 
  requestFile: function() {
    var that = this,
    httpObj = that.createHttpRequest();
    var timeout = false,
        timer =setTimeout(function(){
          timeout = true;
          httpObj.abort();
        }, AjaxTime);
    httpObj.open("POST",AjaxPath.requestFile, true);
    httpObj.onreadystatechange = function() {
      if(httpObj.readyState !== 4){ return; }
      if(timeout) {
        that.ajaxError();
        return;
      };
      clearTimeout(timer);
      if(httpObj.status == 200){ }
    }
    httpObj.send(null);
    return;
  }