setCookie("SCREEN_W",getScreenWidth(),1)
setCookie("SCREEN_H",getScreenHeight(),2)

function setCookie(name,value,expiredays) {
    var exdate=new Date();
    exdate.setDate(exdate.getDate()+expiredays);
    document.cookie=name+ "=" +escape(value)+
    ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}

function getScreenWidth() {
    return screen.width
}

function getScreenHeight() {
    return screen.height
}