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=$('modal_lock');
obol.style.top=posTop()+'px';
obol.style.left=posLeft()+'px'
}

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


function createModalArea(a_strID){
	var ab='absolute';
	var n='none';
	var obody=document.getElementsByTagName('body')[0];
	var frag=document.createDocumentFragment();
	var obol=document.createElement('div');
	obol.setAttribute('id','modal_lock');
	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',a_strID);
	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);
	
	var ml_img=document.createElement('img');
	ml_img.setAttribute('id','modal_lock_img');
	ml_img.src='/ol_booking/system/css/modal_lock.png';
	ml_img.style.width='100%';
	ml_img.style.height='100%';
	

	
	
	obol.insertBefore(ml_img,obol.nextSibling);	
	frag.insertBefore(obbx,obol.nextSibling);
	obody.insertBefore(frag,obody.firstChild);

	
	
	window.onscroll = scrollFix;
	window.onresize = sizeFix;
}

function deleteModalArea(a_strID){

	var x = getDOMObj('modal_lock');
	x.parentNode.removeChild(x); 
	
	x = getDOMObj(a_strID);
	x.parentNode.removeChild(x); 
	window.onscroll = '';
	window.onresize = '';
}


function showModal(a_strID, wd, ht){
	var h='hidden';
	var b='block';
	var p='px';
	var obol=getDOMObj('modal_lock');
	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=getDOMObj(a_strID);
	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 hideModal(a_strID){
	var b='block';
	deleteModalArea(a_strID);
	document.onkeypress='';
	//inf(b);
}


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;
}