function get_cookie(Name) {
var search=Name+"=";
var returnvalue="";
if(document.cookie.length>0){
    offset=document.cookie.indexOf(search);
    if(offset!=-1){
	offset+=search.length;
	end=document.cookie.indexOf(";",offset);
	if(end==-1)end=document.cookie.length;
	returnvalue=unescape(document.cookie.substring(offset,end))
    }
}
return returnvalue;
}
function leave(){
var vn=get_cookie("nvisit");
var lv=get_cookie("lvisit");
var exp=new Date();td=exp.getDate();
if(vn<3&&lv!=td){
    exp.setFullYear(exp.getFullYear()+1);
    vn++;
    document.cookie="nvisit="+vn+";expires="+exp.toGMTString()+";";
    document.cookie="lvisit="+td+";expires="+exp.toGMTString()+";";
    w2=window.open("http://www.jokes.pp.ru/subscribe.pl","","toolbar=no,menubar=no,location=no,scrollbars=no,resizable=no,height=310,width=310");
    var SCRwidth=(window.screen.width-310)/2;
    var SCRheight=(window.screen.height-310)/2;
    w2.moveTo(SCRwidth,SCRheight);
    w2.focus();
    w2.focus();
}
}