text: var c1 = document.getElementById("cerc1");
  var c2 = document.getElementById("cerc2");
  
  c1.addEventListener("touchmove", on_touch_move);
  c2.addEventListener("touchmove", on_touch_move);
  
  function on_touch_move(e)
  
  
  {	
  	for (var i = 0; i < e.changedTouches.length; i++){
  		
  	var t = e.changedTouches[0];
  	var c = t.target;
  	c.setAttribute("cx", t.pageX);
  	c.setAttribute("cy", t.pageY);
  	}	
  	
  	
  	
  }
  
  