function move_box(an, box)
{
    var cleft = 300;
    var ctop = -250;
    var obj = an;

    while (obj.offsetParent)
    {
/*        cleft += obj.offsetLeft;*/
        ctop += obj.offsetTop;
        obj = obj.offsetParent;
    }

    box.style.left = cleft + 'px';

    ctop += an.offsetHeight + 8;


    if (document.body.currentStyle &&
        document.body.currentStyle['marginTop'])
    {
        ctop += parseInt(
            document.body.currentStyle['marginTop']);
    }

    box.style.top = ctop + 'px';
}


function show_hide_box(an, width, height, borderStyle)
{
    var href = an.href;
    var boxdiv = document.getElementById(href);

    if (boxdiv != null)
    {
        if (boxdiv.style.display=='none')
        {
            // Show existing box, move it
            // if document changed layout
            move_box(an, boxdiv);
            boxdiv.style.display='block';
        }
        else
            // Hide currently shown box.
            boxdiv.style.display='none';
        return false;
    }


    boxdiv = document.createElement('div');


    boxdiv.setAttribute('id', href);

    boxdiv.style.display = 'block';
    boxdiv.style.position = 'absolute';
    boxdiv.style.width = width + 'px';
    boxdiv.style.height = height + 'px';
    boxdiv.style.border = borderStyle;
    boxdiv.style.textAlign = 'right';
    boxdiv.style.padding = '2px';
    boxdiv.style.background = '#C0C0C0';
    document.body.appendChild(boxdiv);

    var offset = 0;

    var close_href = document.createElement('a');
    close_href.href = 'javascript:void(0);';
    close_href.onclick = function()
        { show_hide_box(an, width, height, borderStyle); }
    close_href.style.fontFamily = 'Verdana';
    close_href.style.fontSize = '9';
    close_href.style.fontWeight = 'bold';
    close_href.appendChild(document.createTextNode('Close [X]'));
    boxdiv.appendChild(close_href);
    offset = close_href.offsetHeight;
    
    
    var contents = document.createElement('iframe');
    contents.frameBorder = '0';
    contents.style.width = width + 'px';
    contents.style.height = (height - offset) + 'px';

    boxdiv.appendChild(contents);

    move_box(an, boxdiv);

    if (contents.contentWindow)
        contents.contentWindow.document.location.replace(
            href);
    else
        contents.src = href;


    return false;
}