num_days = 7;
thiscookie = "ddsHeader"; 
readCookie(thiscookie);

function readCookie(cookieName){
	var start = parseInt(getCookie(cookieName));
	if (!start)
	  {
		  start = 3;
	  }

		switch(start)
			{
		    case 1:
				document.write('<div id="newHeader2">');  
				setCookie(cookieName,2,num_days)
			  break;
			 case 2:
				document.write('<div id="newHeader3">');  
				setCookie(cookieName,3,num_days)
			  break;
			case 3:
				document.write('<div id="newHeader4">');  
				setCookie(cookieName,4,num_days)
			  break;
			case 4:
				document.write('<div id="newHeader">');  
				setCookie(cookieName,1,num_days)
			  break;
			default:
			  
			}
}
 
function ged(noDays){
    var today = new Date();
    var expr = new Date(today.getTime() + noDays*24*60*60*1000);
    return  expr.toGMTString();
}

function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=");
  if (c_start!=-1)
    {
    c_start=c_start + c_name.length+1;
    c_end=document.cookie.indexOf(";",c_start);
    if (c_end==-1) c_end=document.cookie.length;
    return unescape(document.cookie.substring(c_start,c_end));
    }
  }
return "";
}

function setCookie(c_name,value,expiredays)
{
var exdate=new Date();
exdate.setDate(exdate.getDate()+expiredays);
document.cookie=c_name+ "=" +escape(value)+
((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}