function blanket_size(popUpDivVar) {
    if (typeof window.innerWidth != 'undefined') {
        viewportheight = window.innerHeight;
    } else {
        viewportheight = document.documentElement.clientHeight;
    }
    if ((viewportheight > document.body.parentNode.scrollHeight) && (viewportheight > document.body.parentNode.clientHeight)) {
        blanket_height = viewportheight;
    } else {
        if (document.body.parentNode.clientHeight > document.body.parentNode.scrollHeight) {
            blanket_height = document.body.parentNode.clientHeight;
        } else {
            blanket_height = document.body.parentNode.scrollHeight;
        }
    }
    var blanket = document.getElementById('blanket');
    blanket.style.height = blanket_height + 'px';
    var popUpDiv = document.getElementById(popUpDivVar);
    popUpDiv_height = 100;
    popUpDiv_height = blanket_height / 2 - 50; //50 is half popup's height
    popUpDiv.style.top = popUpDiv_height + 'px';
}
function window_pos(popUpDivVar) {
    if (typeof window.innerWidth != 'undefined') {
        viewportwidth = window.innerHeight;
    } else {
        viewportwidth = document.documentElement.clientHeight;
    }
    if ((viewportwidth > document.body.parentNode.scrollWidth) && (viewportwidth > document.body.parentNode.clientWidth)) {
        window_width = viewportwidth;
    } else {
        if (document.body.parentNode.clientWidth > document.body.parentNode.scrollWidth) {
            window_width = document.body.parentNode.clientWidth;
        } else {
            window_width = document.body.parentNode.scrollWidth;
        }
    }
    var popUpDiv = document.getElementById(popUpDivVar);
    window_width = window_width / 2 - 150; //150 is half popup's width
    popUpDiv.style.left = window_width + 'px';
}

function toggle2(div_id) {
    var el = document.getElementById(div_id);
    try {
        if (el.style.display == 'none') { el.style.display = 'block'; }
        else { el.style.display = 'none'; }
    } catch (error) {
        // nothing
    }
}

function divup(windowname, popun, parenturl, popurl) {
    blanket_size(windowname);
    window_pos(windowname);

    //blanket.style.height = '2000px';
    //popUpDiv.style.top = '250px';
    //popUpDiv.style.left = '300px';

    toggle2('blanket');
    toggle2(windowname);

    /*if (popun == 1) {
        parent.location.replace(parenturl);
        var newtop = parent.top;
        var newwin;
        newwin = window.open(popurl, 'newwin', 'width=800,height=600,location=yes,resizable=yes,scrollbars=yes,titlebar=yes,toolbar=yes');
        if (newwin) {
            newwin.blur();
            newwin.top = newtop;
        }
    }*/
}