ckary = new Array();
function referrer_cookie() {

    ckary[0] = encodeURIComponent(document.referrer);

    exp=new Date();

    exp.setTime(exp.getTime()+1000*60*60*24*1);

    ckstr = ckary[0];

    document.cookie = "mysumi_referrer=" + ckstr + "; expires=" + exp.toGMTString() + "; path= /";

}