// Set "UseCookie"               
// 0 - Randomize banners         
// 1 - Use cookie               

var useCookie = 0;

var rndnmb = -1;

expDays = 365;
exp = new Date();
exp.setTime(exp.getTime() + (expDays * 24 * 60 * 60 * 1000));

var cocho = parseInt(GetCookie("Banner"));

if (useCookie != 1)
{
// change rndnmb number below to banner total + 1 
     while (rndnmb < 0 || rndnmb > 13)
     {
          rndnmb = Math.random();
// change rndnmb number below to banner total + 1 
		  rndnmb = Math.round(rndnmb *= 13) - 1;
     }
}
else
{
// change coho number below to banner total + 1 
     if (cocho >= 0 && cocho <= 13)
     {
          cocho += 1;
// change coho number below to banner total + 1 
          if (cocho > 15)
               cocho = 0;
     }
     else
          cocho = 0;

     SetCookie ("Banner", cocho);
     rndnmb = cocho;
}

document.write ("<IMG src='" + banner[rndnmb][0] + "' border=0>");

function GetCookieVal(offset)
{
     var endstr = document.cookie.indexOf(";", offset);

     if (endstr == -1)
          endstr = document.cookie.length;

     return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie(name)
{
     var arg = name + "=";
     var alen = arg.length;
     var clen = document.cookie.length;
     var i = 0;

     while (i < clen)
     {
          var j = i + alen;

          if (document.cookie.substring(i, j) == arg)
               return GetCookieVal(j);

          i = document.cookie.indexOf(" ", i) + 1;

          if (i == 0)
               break;
     }

     return "";
}

function SetCookie(name, value)
{
     document.cookie = name + "=" + escape(value) + "; expires=" + exp.toGMTString();
}