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.toUTCString()); }
 
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));           }
     }