// 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 scrollFix() {
    var obol=document.getElementById('ol');
    obol.style.top=posTop()+'px';
    obol.style.left=posLeft()+'px';
}

function sizeFix() {
    var obol=document.getElementById('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 b='block';
    var p='px';
    var obol=document.getElementById('ol'); 
    var obbxd = document.getElementById('mbd');
    obbxd.innerHTML = document.getElementById(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=document.getElementById('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);
    obbx.style.display=b;
    return false;
}

function hm() {
    var v='visible';
    var n='none';
    document.getElementById('ol').style.display=n;
    document.getElementById('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;
}