// Modal Dialog Box
// copyright 8th July 2006 by Stephen Chapman
// http://javascript.about.com/
// permission to use this Javascript on your web page is granted
// provided that all of the code in this script (including these
// comments) is used without any alteration
function pageWidth()
{
    return window.innerWidth != null
            ? window.innerWidth 
            : document.documentElement && document.documentElement.clientWidth 
                ? document.documentElement.clientWidth
                : document.body != null
                    ? document.body.clientWidth
                    : null;
}
function pageHeight()
{
    return window.innerHeight != null
            ? window.innerHeight
            : document.documentElement && document.documentElement.clientHeight
                ? document.documentElement.clientHeight
                : document.body != null
                    ? document.body.clientHeight
                    : null;
}

function posLeft()
{
    return typeof window.pageXOffset != 'undefined' 
                    ? window.pageXOffset
                    : document.documentElement && document.documentElement.scrollLeft
                        ? document.documentElement.scrollLeft
                        : document.body.scrollLeft
                            ? document.body.scrollLeft
                            : 0;
}

function posTop()
{
    return typeof window.pageYOffset != 'undefined' 
                ? window.pageYOffset
                : document.documentElement && document.documentElement.scrollTop
                    ? document.documentElement.scrollTop
                    : document.body.scrollTop
                        ? document.body.scrollTop
                        : 0;
}

function gebid(x)
{
    return document.getElementById(x);
}

function scrollFix()
{
    var obol=gebid('ol');
    obol.style.top=posTop()+'px';
    obol.style.left=posLeft()+'px';
}

function sizeFix()
{
    var obol=gebid('ol');
    obol.style.height=pageHeight()+'px';
    obol.style.width=pageWidth()+'px';
}

function kp(e)
{
    ky=e ? e.which : event.keyCode;
    if(ky==88||ky==120) hm();
    return false;
}

function inf(h)
{
    tag=document.getElementsByTagName('select');
    for(i=tag.length-1;i>=0;i--) tag[i].style.visibility=h;
    tag=document.getElementsByTagName('iframe');
    for(i=tag.length-1;i>=0;i--) tag[i].style.visibility=h;
    tag=document.getElementsByTagName('object');
    for(i=tag.length-1;i>=0;i--) tag[i].style.visibility=h;
}

function sm(obl, wd, ht)
{
    var h='hidden';
    // var h='visible';
    var b='block';
    var p='px';
    var obol=gebid('ol'); 
    var obbxd = gebid('mbd');
    var dialogHTML = gebid(obl).innerHTML;
    obol.style.height=pageHeight()+p;
    obol.style.width=pageWidth()+p;
    obol.style.top=posTop()+p;
    obol.style.left=posLeft()+p;
    obol.style.display=b;
    var tp=posTop()+((pageHeight()-ht)/2)-12;
    var lt=posLeft()+((pageWidth()-wd)/2)-12;
    var obbx=gebid('mbox');
    obbx.style.top=(tp<0 ? 0 : tp)+p;
    obbx.style.left=(lt<0?0:lt)+p;
    obbx.style.width=wd+p;
    obbx.style.height=ht+p;
    inf(h);
    obbxd.innerHTML = dialogHTML;
    obbx.style.display=b;
    return false;
}

function hm()
{
    var v='visible';
    // var v='hidden';
    var n='none';
    gebid('ol').style.display=n;
    gebid('mbox').style.display=n;
    inf(v);
    document.onkeypress=''
}

function initmb()
{
    var ab='absolute';
    var n='none';
    var obody=document.getElementsByTagName('body')[0];
    var frag=document.createDocumentFragment();
    var obol=document.createElement('div');
    obol.setAttribute('id','ol');
    obol.style.display=n;
    obol.style.position=ab;
    obol.style.top=0;
    obol.style.left=0;
    obol.style.zIndex=998;
    obol.style.width='100%';
    frag.appendChild(obol);
    var obbx=document.createElement('div');
    obbx.setAttribute('id','mbox');
    obbx.style.display=n;
    obbx.style.position=ab;
    obbx.style.zIndex=999;
    var obl=document.createElement('span');
    obbx.appendChild(obl);
    var obbxd=document.createElement('div');
    obbxd.setAttribute('id','mbd');
    obl.appendChild(obbxd);
    frag.insertBefore(obbx,obol.nextSibling);
    obody.insertBefore(frag,obody.firstChild);
    window.onscroll = scrollFix; 
    window.onresize = sizeFix;
}