function setCookie(name, value, expires, path, domain, secure) {
		  var curCookie = name + "=" + escape(value) +
		      ((expires) ? "; expires=" + expires.toGMTString() : "") +
		      ((path) ? "; path=" + path : "") +
		      ((domain) ? "; domain=" + domain : "") +
		      ((secure) ? "; secure" : "");
		  document.cookie = curCookie;
		}
		
		function getCookie(name) {
		  var dc = document.cookie;
		  var prefix = name + "=";
		  var begin = dc.indexOf("; " + prefix);
		  if (begin == -1) {
		    begin = dc.indexOf(prefix);
		    if (begin != 0) return null;
		  } else
		    begin += 2;
		  var end = document.cookie.indexOf(";", begin);
		  if (end == -1)
		    end = dc.length;
		  return unescape(dc.substring(begin + prefix.length, end));
		}
		
		var i = getCookie('insight');
		if (!i || parseInt(i)==5) {
		  var now = new Date()
		  now.setTime(now.getTime() + 365 * 24 * 60 * 60 * 1000);
		  i=2;
		} else {
		  i = parseInt(i) + 1;
		}
		setCookie('insight',i,now);
		image = (i-1);