function querySt(ji){hu=window.location.search.substring(1);gy=hu.split("&");for(i=0;i<gy.length;i ++){ft=gy[i].split("=");if(ft[0]==ji){return ft[1];}}}

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)+";path=/"+
((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}

function set_referral_cookie() {
    setCookie('referral_id', querySt('ref'), 30);
}