//show comercial function
function showComercial() {
    if (document.getelementbyid) { // DOM3 = IE5, NS6
        document.getelementbyid('comercialPopUp').style.visibility = 'visible';
    }
    else {
        if (document.layers) { // Netscape 4
            document.comercialPopUp.visibility = 'visible';
        }
        else { // IE 4
            document.all.comercialPopUp.style.visibility = 'visible';
        }
    }
}
//close function
function closeComercial() {
    if (document.getelementbyid) { // DOM3 = IE5, NS6
        document.getelementbyid('comercialPopUp').style.visibility = 'hidden';
    }
    else {
        if (document.layers) { // Netscape 4
            document.comercialPopUp.visibility = 'hidden';
        }
        else { // IE 4
            document.all.comercialPopUp.style.visibility = 'hidden';
        }
    }
}

//cookie handling start
var expDays = 1; // number of days the cookie should last

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

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

function amt() {
    var count = GetCookie('comercialCount')
    if (count == null) {
        SetCookie('comercialCount', '1')
        return 1
    } else {
        var newcount = parseInt(count) + 1;
        DeleteCookie('comercialCount')
        SetCookie('comercialCount', newcount, exp)
        return count
    }
}

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

function checkCount() {
    var count = GetCookie('comercialCount');
//  count = null;
    if (count == null) {
        count = count + 1;
        SetCookie('comercialCount', count, exp);
        showComercial();
    } else {
        count++;
        SetCookie('comercialCount', count, exp);
    }
}
//cookie handling end
window.onload = checkCount;