// 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 $(x){
  return document.getElementById(x);
}

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

function sizeFix(){
  var obol=$('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;
}

var initializedMB=false;
function sm(obl, wd, ht){
	 if (!initializedMB)
	 {
		 initmb();
		 initializedMB = true;
	 };

  var h='hidden';
  var b='block';
  var p='px';
  var obol=$('ol'); 
  var obbxd = $('mbd');
  obbxd.innerHTML = $(obl).innerHTML;
  obol.style.height=pageHeight()+p;
  obol.style.width=pageWidth()+p;
  obol.style.top=posTop()+p;
  obol.style.left=posLeft()+p;
  obol.style.display=b;
  var tp=posTop()+((pageHeight()-ht)/2)-12;
  var lt=posLeft()+((pageWidth()-wd)/2)-12;
  var obbx=$('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';
  $('ol').style.display=n;
  $('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;
}