Detect ADblock

detect.ad.block.js

var AdBlocker = function(){

  if(typeof(window.google_render_ad)=="undefined") 
  { 
    //They're blocking ads, do something else.
    return true;  
  }
  else if( typeof(window.google_jobrunner)=='undefined')
  {
    return true;
  }
  
  return false;
}