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())+";path=/";
}

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 "";
}