Mamdouh-Freelancer

/*
This tool is useful to reach the seller if the ad is expired. Tested & works with Olx Egypt "olx.com.eg"
*/
adid = document.URL.split("-ID")[1].split(".")[0];
contact_info = "https://www.olx.com.eg/api/listing/" + adid + "/contactInfo/";
ad_details = "https://www.olx.com.eg/api/listing/?external_id=" + adid;
callAPI(contact_info, function(d) {
  j = JSON.parse(d);
  //output seller name & registered mobile number if exists
  console.log("name:", j.name, "\nmobile:", j.mobile);

Mamdouh-Freelancer

/*
 @ Created By Mamdouh Freelancer
 @ Feel free to contact me any time
 # https://fb.me/Mamdouh.Freelancer
 # https://stackoverflow.com/users/7040620/mamdouh-freelancer
*/
    function RedoUndo(a) {
      if (!a) console.error("Add textarea using new RedoUndo(textareaElement)");
      var curr = 0;
      this.redoButton = function(b) {

Mamdouh-Freelancer

/*
@Mamdouh Freelancer
SO account: http://stackoverflow.com/users/7040620/
Github: https://github.com/Mamdouh-Freelancer
*/

//usage: location.href.param("key");

String.prototype.param = function(str) {
  e = this.indexOf("?" + str + "=") > -1 ? "?" + str + "=" : "&" + str + "=";