$(document).ready(function () {
    newImage();
});

function getCookieVal(offset) {
    var endstr = document.cookie.indexOf(";", offset);
    if (endstr == -1)
        endstr = document.cookie.length;
    return unescape(document.cookie.substring(offset, endstr));
}

//function getCookie(name) {
//    var arg = name + "=";
//    var alen = arg.length;
//    var clen = document.cookie.length;
//    var i = 0;
//    while (i < clen) {
//        var j = i + alen;
//        if (document.cookie.substring(i, j) == arg)
//            return getCookieVal(j);
//        i = document.cookie.indexOf(" ", i) + 1;
//        if (i == 0) break;
//    }
//    return null;
//}
function getCookie(name) {
    if (document.cookie.length > 0) {
        c_start = document.cookie.indexOf(name + "=");
        if (c_start != -1) {
            c_start = c_start + name.length + 1;
            c_end = document.cookie.indexOf(";", c_start);
            if (c_end == -1) c_end = document.cookie.length;
            return unescape(document.cookie.substring(c_start, c_end));
        }
    }
    return false;
}

//function setCookie(name, value) {
//    var argv = setCookie.arguments;
//    var argc = setCookie.arguments.length;
//    var expires = (argc > 2) ? argv[2] : null;
//    var path = (argc > 3) ? argv[3] : null;
//    var domain = (argc > 4) ? argv[4] : null;
//    var secure = (argc > 5) ? argv[5] : false;
//    document.cookie = name + "=" + escape(value) +
//	        ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
//	        ((path == null) ? "" : ("; path=" + path)) +
//	        ((domain == null) ? "" : ("; domain=" + domain)) +
//	        ((secure == true) ? "; secure" : "");
//}
function setCookie(c_name, value, expiredays) {
    var exdate = new Date();
    exdate.setDate(exdate.getDate() + expiredays);
    document.cookie = c_name + "=" + escape(value) + ((expiredays == null) ? "" : "; expires=" + exdate.toGMTString()) + "; path=/";
}

function newImage() {
    var imgArr = ["images/Home.png", "images/Home2.png", "images/Home3.png", "images/Home4.png", "images/Home5.png"];  // load the array with the images you want to rotate through
    var arrInx = getCookie("lastImage");
    if (arrInx == NaN || arrInx == null) arrInx = -1;
    arrInx++;
    if (arrInx >= imgArr.length) arrInx = 0;
    setCookie("lastImage", arrInx,1);
    document.getElementById("imgRotate").src = imgArr[arrInx];
}