var hideDelayTimer=null;
           var hideDelay=100;
           label.addEventListener("mouseover",function()
          {
            if(hideDelayTimer)clearTimeout(hideDelayTimer);

              alert('mouseover');
              label.appendChild(popup);
          });

          label.addEventListener("mouseout",function()
            {
            alert('mouseout');
            if(hideDelayTimer)clearTimeout(hideDelayTimer);
            hideDelayTimer=setTimeout(function()
            {
            hideDelayTimer=null;
            label.removeChild(popup);

           },hideDelay);