var isHidden = true; function freeTicket(ev,lay){ var oEvent = window.event?window.event:ev; var l = document.getElementById(lay); var x = oEvent.x ? oEvent.x : oEvent.pageX; x = (x > document.body.clientWidth/2) ? (x - 312) : x; var y = oEvent.y ? oEvent.y : oEvent.pageY; if(isHidden){ l.style.display='block'; l.style.left = x; l.style.top = y; }else l.style.display = 'none'; isHidden = !isHidden; }