window.onresize = checkSidebar;
window.onload = checkSidebar;

function checkSidebar() {
    var winW;
    if (self.innerWidth) {
        winW = self.innerWidth;
    } else if (document.documentElement && document.documentElement.clientWidth) {
        winW = document.documentElement.clientWidth;
    } else if (document.body) {
        winW = document.body.clientWidth;
    }
    var sidebar = document.getElementById("sidebar");
    if (winW < 1000) sidebar.className = "none";
    else sidebar.className = readCookie("side");
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for (var i = 0; i < ca.length; i++) {
        var c = ca[i];
        while (c.charAt(0) == ' ') c = c.substring(1, c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
    }
    return null;
}