var prevValue = readCookie("BlogNewVisitor");
var visitCount;
if (prevValue == null) {
    visitCount = 0;
}
else {
    visitCount = parseInt(prevValue, 10);
}

if (visitCount < 5) {
    document.getElementById("NewVisitorBox").style.display = "block";
    visitCount++;
    createCookie("BlogNewVisitor", visitCount + '', 60);
}

function createCookie(name, value, days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        var expires = "; expires=" + date.toGMTString();
    }
    else var expires = "";
    document.cookie = name + "=" + value + expires + "; path=/";
}

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;
}