function isMobileDevice() { return (typeof window.orientation !== "undefined") || (navigator.userAgent.indexOf('IEMobile') !== -1); }; if(isMobileDevice()) { //alert("mobile"); document.cookie = "browsertype=mobile" } else { //alert("pc"); document.cookie = "browsertype=pc" } //alert(isMobileDevice()); function hide() { document.getElementById("advice").style.visibility = "hidden"; document.getElementById("advice").innerHTML = ""; document.cookie="cookie=1"; }