function showBirds(bird) {
	if (document.getElementById(bird)) {
		bLayer = document.getElementById(bird)
		bLayer.style.visibility = "visible"; 
	}
}

function hideBirdsDev(bird) {
	if (document.getElementById(bird)) {
		bLayer = document.getElementById(bird)
		for(var i=1;i < 8;i++) {
    		var b = "B" + i;
    		bird2=readCookie(b);
    		
    		if (bird == bird2) {
				bLayer.style.visibility = "visible"; 
				alert("visible");
				} else {
				bLayer.style.visibility = "hidden"; 
				alert("hidden");
			}
  		}		
	}
}

function hideBirds(bird) {
	if (document.getElementById(bird)) {
		bLayer = document.getElementById(bird)
		bLayer.style.visibility = "hidden"; 
	}
}

function checkBirds(bird) {
	hideBirds(bird);
//	alert("check");
	setBirds();
}



function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

function setBirds() {
	for(var i=1;i < 8;i++) {
    	var b = "B" + i;
    	bird=readCookie(b);
    	showBirds(bird);
  	}
}

function readCookieDev(name2) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

function setBirdsDev() {
	for(var i=1;i < 8;i++) {
    	var b = "C" + i;
    	bird=readCookie(b);
    	showBirds(bird);
  	}
}