// Sets cookie values. Expiration date is optional
// setCookie(name,value) sets cookie name to value. Will expire after session ends.
// setCookie(name,value,days) expires after so many days.  Enter negative days to kill cookie.
// getCookie(name) gets cookie. null if no such cookie.  

function setCookie1(name, value, expire)
{
   document.cookie = name + "=" + escape(value)  + ((expire == null) ? "" : ("; expires=" + expire.toGMTString())) ;
}

function getCookie(Name)
{
	var search = Name + "=";
	if (document.cookie.length > 0) // if there are any cookies
	{ 
	  offset = document.cookie.indexOf(search);

	  if (offset != -1)  // if particular cookie exists
	  {  
		 offset += search.length;  // set index of beginning of value
		 end = document.cookie.indexOf(";", offset);

		 // set index of end of cookie value
		 if (end == -1)   
			end = document.cookie.length;
	
		 return unescape(document.cookie.substring(offset, end)) ;      
	  }    
	}
}

function setCookie(name,value,days)
{
    if (days == null)
    {
		setCookie1(name,value) ;
    }
    else
    {
	today = new Date();
	expiredate = new Date();
	expiredate.setTime(today.getTime()+days*60*60*24*1000);
	setCookie1(name,value,expiredate);
    }
}