function OpenModelPopup() {
    document.getElementById('ModelPopupDiv').style.visibility = 'visible';
    document.getElementById('ModelPopupDiv').style.display = '';
    document.getElementById('ModelPopupDiv').style.top = Math.round((document.documentElement.clientHeight / 2) + document.documentElement.scrollTop) - 100 + 'px';
    document.getElementById('ModelPopupDiv').style.width = 'auto';
    document.getElementById('ModelPopupDiv').style.align = 'Center';
    document.getElementById('ModelPopupDiv').style.position = 'absolute';
    document.getElementById('ModelPopupDiv').style.marginLeft = '20%';
    document.getElementById('ModelPopupDiv').style.marginRight= '20%';
    
    //document.getElementById('ModelPopupDiv').style.left = '230px';

    document.getElementById('MaskedDiv').style.display = '';
    document.getElementById('MaskedDiv').style.visibility = 'visible';
    document.getElementById('MaskedDiv').style.top = '0px';
    document.getElementById('MaskedDiv').style.left = '0px';
    
    document.getElementById('MaskedDiv').style.width = document.documentElement.clientWidth + 'px';
    document.getElementById('MaskedDiv').style.height = '1910px'; //document.documentElement.clientHeight + 'px';
}

function CloseModelPopup() {
    document.getElementById('MaskedDiv').style.display = 'none';
    document.getElementById('ModelPopupDiv').style.display = 'none';
}

var expDays = 60; // number of days the cookie should last 
var page = "http://localhost/DNH/Survey/PopupWindow.aspx";
var windowprops = "width=600,height=500,location=0,toolbar=no,menubar=no,scrollbars=yes,resizable=no";
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('count')
    if (count == null) {
        SetCookie('count', '1')
        return 1
    }
    else {
        var newcount = parseInt(count) + 1;
        DeleteCookie('count')
        SetCookie('count', 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('count');
    if (count == null) {
        count = 1;
        SetCookie('count', count, exp, '/');
        OpenModelPopup();
        // window.open(page, "", windowprops);
    }
    else {
        count++;
        SetCookie('count', count, exp, '/');
    }
}

function checkCount1() {
    window.open(page, "", windowprops);
}