NumberOfDivsToRandomDisplay = 8;


var CookieName = 'DivRamdomValueCookie';
function DisplayRandomDiv() {
	var r = Math.ceil(Math.random() * NumberOfDivsToRandomDisplay);
	if (NumberOfDivsToRandomDisplay > 1) {
		var ck = 0;
		var cookiebegin = document.cookie.indexOf(CookieName + "=");
		if (cookiebegin > -1) {
			cookiebegin += 1 + CookieName.length;
			cookieend = document.cookie.indexOf(";", cookiebegin);
			if (cookieend < cookiebegin) {
				cookieend = document.cookie.length;
			}
			ck = parseInt(document.cookie.substring(cookiebegin, cookieend));
		}
		while (r == ck) {
			r = Math.ceil(Math.random() * NumberOfDivsToRandomDisplay);
		}
		document.cookie = CookieName + "=" + r;

	}

	setTimeout("DisplayRandomDiv()", 8000);
	
	for ( var i = 1; i <= NumberOfDivsToRandomDisplay; i++) {
		document.getElementById('case'+i).style.display='none';
	}
	document.getElementById('case'+r).style.display='block';
}


/*NumberOfDivsToRandomDisplay = 23;

var CookieName = 'DivRamdomValueCookie';
function DisplayRandomDiv() {
var r = Math.ceil(Math.random() * NumberOfDivsToRandomDisplay);
if(NumberOfDivsToRandomDisplay > 1) {
   var ck = 0;
   var cookiebegin = document.cookie.indexOf(CookieName + "=");
   if(cookiebegin > -1) {
      cookiebegin += 1 + CookieName.length;
      cookieend = document.cookie.indexOf(";",cookiebegin);
      if(cookieend < cookiebegin) { cookieend = document.cookie.length; }
      ck = parseInt(document.cookie.substring(cookiebegin,cookieend));
      }
   while(r == ck) { r = Math.ceil(Math.random() * NumberOfDivsToRandomDisplay); }
   document.cookie = CookieName + "=" + r;
   }
   setInterval("DisplayRandomDiv()",9000);

for( var i=1; i<=NumberOfDivsToRandomDisplay; i++) {
   document.getElementById("case"+i).style.display="none";
   }
document.getElementById("case"+r).style.display="block";
}
DisplayRandomDiv();*/