function touchHandler(event)
{   
    
    var touches = event.changedTouches,
        first = touches[0],
        type = "";
         switch(event.type)
    {
        case "touchstart": type="mousedown"; break;
        case "touchmove":  type="mousemove"; break;        
        case "touchend":   type="mouseup"; break;
        default: return;
    }

             //initMouseEvent(type, canBubble, cancelable, view, clickCount, 
    //           screenX, screenY, clientX, clientY, ctrlKey, 
    //           altKey, shiftKey, metaKey, button, relatedTarget);
    
    var simulatedEvent = document.createEvent("MouseEvent");
    simulatedEvent.initMouseEvent(type, true, true, window, 1, 
                              first.screenX, first.screenY, 
                              first.clientX, first.clientY, false, 
                              false, false, false, 0/*left*/, null);
    if(touches.length < 2) {
      first.target.dispatchEvent(simulatedEvent);
      event.preventDefault();
    }
}