// 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;
	if (h=='visible') {
		for(i=tag.length-1;i>=0;i--)tag[i].disabled=false;
	}
	else {
		for(i=tag.length-1;i>=0;i--)tag[i].disabled=true;
	}	
	//PS remove hiding iframes as we're using them to shim as below
	//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, focusTo){
	dialogActive=true;
	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;
	if (focusTo!=null) {
		document.getElementById(focusTo).focus();
	}
	//return false;
}

function hm(){
	dialogActive=false;
	if(document.getElementById('iframe_ie6')!=null) {
		document.getElementById('iframe_ie6').style.display = "none";
	}
	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;
}