var blinkvar = '1';
function toggle_visibility(id) {
var e = document.getElementById(id);
e.style.display = 'none';
}

var count=11;
var timerlayer;

function blink() {
   var e = document.getElementById("blinker");
   e.style.visibility = ( e.style.visibility == 'visible' )? 'hidden' : 'visible';
   setTimeout("blink();", 500);
}