var expDays = 1;
var cookieName = "step";
var redirectTo = "../public/open.shtml";

function GetMyCookie(cookieName) {
    var arg = cookieName + "=";
    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 SetCookie (cookieName, 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 = cookieName + "=" + escape (value) +
    ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
    ((path == null) ? "" : ("; path=" + path)) +
    ((domain == null) ? "" : ("; domain=" + domain)) +
    ((secure == true) ? "; secure" : "");
}

function DeleteCookie(cookieName) {
    var exp = new Date();
    exp.setTime (exp.getTime() - 1);
    var cval = GetMyCookie (cookieName);
    document.cookie = cookieName + "=" + cval + "; expires=" + exp.toGMTString();
}

var exp = new Date();
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));


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

function checkStep() {
    var sPath = window.location.pathname;
    var sPage = sPath.substring(sPath.lastIndexOf('/') + 1);
    
    var cookieValue = GetMyCookie(cookieName);
    switch(cookieValue) {
        case null:
            if (sPage=='open.shtml') {
                cleanup();
            } else {redirectClient();}
        break;
        
        case 'app01.shtml':
            if (cookieValue !==sPage) {
                redirectClient();
            }
        break;

        case 'app02.shtml':
            if (cookieValue !==sPage) {
                redirectClient();
            }
        break;

        case 'appdDone.shtml':
            if (cookieValue !==sPage) {
                redirectClient();
            }
        break;
            
        default:
            if (cookieValue!=='appDone.shtml' && sPage!=='app02.shtml') {
                redirectClient();
            }
        break;
    }
}

function redirectClient() {
    alert("Please start at the first step of the application process");
    window.location = redirectTo;
}

function cleanup() {
    DeleteCookie(cookieName);
}

function nextStep(pageName) {
    SetCookie(cookieName, pageName, exp);
}