... if(document.cookie != "") { var kk=document.cookie.indexOf(name+"="); if(kk >= 0) { kk=kk+name.length+1; var ll=document.cookie.indexOf(";", kk); if(ll < 0)ll=document.cookie.length; value=document.cookie.substring(kk, ... get_cookie(name) / /doc Cookie { var value; if(document.cookie != "") { var kk=document.cookie.indexOf(name+"="); if(kk >= 0) { kk=kk+name.length+1; var ll=document.cookie.indexOf(";", kk); if(ll < 0)ll=document.cookie.length; ... undefined){ document.write("Chao ban, cam on ban da toi tham!"); } else{ document.write("Chao " + visitor_name + ", cam on ban da quay lai!"); } function TDPN() { var ten = document.getName.Visit.value;...