function set_cookie(c_name,value,expiredays) 
{
    var exdate=new Date();
    exdate.setDate(exdate.getDate()+expiredays);
    document.cookie=c_name+ "=" +escape(value)+
    ((expiredays==null) ? "" : ";expires="+exdate.toGMTString())+';path=/';    
}
function get_cookie(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 "";
}       
set_cookie('cookiedetector','OK',1);
result=get_cookie('cookiedetector');
if (result!='OK') {alert("Warning - Please enable cookies for this site otherwise your login will not persist!");}