// Modal Dialog Box
// copyright 8th July 2006 by Stephen Chapman
// http://javascript.about.com/ol
// 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;
}

//This func conflicts with Prototype lib.
//function document.getElementById(x){
//   return document.getElementById(x);
//}
  
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;
}

window.onload = initmb;