function godSaveTheImages(){
    var i = document.getElementsByTagName('img');
    for (var n = 0;n<i.length;n++){
        i[n].onmousedown = disableRightClick;
        i[n].oncontextmenu = function(){ return false;};
    }
}

function disableRightClick(e){
   if (!e){
      e = window.event;
   }
   if (e.button){
      if (e.button > 1){
         showCopyrightMessage();
      }
   }else if (e.which){
      if (e.which > 1){
         showCopyrightMessage();
      }
   }
   return false;
}

function showCopyrightMessage(){
   //window.alert('to download pictures, please go to client login');
}