/*
JavaScript Gallery v1.2
Copyright (C) 2008 Aptus s.c.
All rights reserved
*/

var jsgId='JSgallery';
var jsgImgPath='i/';
var jsgDefaultId='jsg';

var jsgOldOnResize, jsgOldOnScroll;
var jsgActive=null;
var jsgGalleries=[];
var jsgCallback=false;
var jsgSrc;
var jsgAddHeight=80; //additional height - header + footer;
var jsgDoMove=true;

function jsgMove()
{
	var e=document.getElementById(jsgId+'_window');
	if(e) {
		var es=e.style;
		var mx=document.documentElement.scrollLeft;
		var my=document.documentElement.scrollTop;
		if((document.documentElement.scrollTop==0 || typeof(document.documentElement.scrollTop=='undefined')) && document.body.scrollTop>0 && typeof(document.body.scrollTop!='undefined'))
			 my=document.body.scrollTop; //safari
		if(typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth != 'undefined' && document.documentElement.clientWidth != 0){
			cx = document.documentElement.clientWidth;
			cy = document.documentElement.clientHeight;
		}
		else{
			cx = document.getElementsByTagName('body')[0].clientWidth;
			cy = document.getElementsByTagName('body')[0].clientHeight;
		}
		var x=Math.floor(cx/2-e.offsetWidth/2)+mx;
		var y=Math.floor(cy/2-e.offsetHeight/2)+my;
		if(y<0)
			y=0;
		if(x<0)
			x=cx-e.offsetWidth;
		es.left=x+'px';
		es.top=y+'px';		
	}
}

function jsgOnScroll(e)
{
	if(jsgDoMove){
		jsgMove();
		if(jsgOldOnScroll)
			jsgOldOnScroll(e);
	}
}

function jsgResize()
{
	var ew;	
	var eh;
	var img = document.getElementById(jsgId+'_image');
	var imgh = typeof(img)=='object' ? img.height+jsgAddHeight : 0;
	var imgw = typeof(img)=='object' ? img.width : 0;

	if(typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth != 'undefined' && document.documentElement.clientWidth != 0){
		ew = document.documentElement.clientWidth;
		eh = document.documentElement.clientHeight;
	}
	else{
		ew = document.getElementsByTagName('body')[0].clientWidth;
		eh = document.getElementsByTagName('body')[0].clientHeight;
	}

	jsgDoMove=imgh<eh;
	eh=document.body.scrollHeight>eh ? document.body.scrollHeight : eh;	
	eh = imgh>eh ? imgh : eh;
	ew = imgw>ew ? imgw : ew;
	
	var e=document.getElementById(jsgId);
	if(e) {
		var es=e.style;
		if(es.display!='none') {
			es.display='none';
			es.width=ew+'px';
			es.height=eh+'px';
			es.display='';
		}
		jsgMove();
	}
}

function jsgOnResize(e)
{
	jsgResize();
	if(jsgOldOnResize)
		jsgOldOnResize(e);
}

function jsgReadyState()
{
	if(event.srcElement.readyState=='complete')
		jsgMove();
}

function jsgLoad(e)
{
	jsgMove();
}

function jsgImgClick(e)
{
	var img=document.getElementById(jsgId+'_image');
	if(typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth != 'undefined' && document.documentElement.clientWidth != 0)
		var ew = document.documentElement.clientWidth;
	else
		var ew = document.getElementsByTagName('body')[0].clientWidth;
	var x=e ? e.pageX : event.clientX;
	if(x<ew/2)
		jsgActive.prev();
	else
		jsgActive.next();
}

function jsgImgOver()
{
	document.getElementById(jsgId+'_navcntr').style.display = 'block';
}

function jsgImgOut()
{
	document.getElementById(jsgId+'_navcntr').style.display = 'none';
}

function jsgInit()
{
	var e=document.getElementById(jsgId);
	if(!e) {
		jsgOldOnResize=window.onresize;
		window.onresize=jsgOnResize;
		jsgOldOnScroll=window.onscroll;
		window.onscroll=jsgOnScroll;
		var e=document.createElement('div');
		e.id=jsgId;
		e.style.position='absolute';
		e.style.left='0px';
		e.style.top='0px';
		var bg='';
		if(typeof e.style.opacity!='undefined')
			bg ='<div style="background-color:#000; opacity:0.6; z-index:9995; position:absolute; width:100%; height:100%;"></div>';		
		else if(typeof e.style.filter!='undefined')
      bg ='<div style="background-color:#000; filter:progid:DXImageTransform.Microsoft.Alpha(opacity=60); z-index:9995; position:absolute; width:100%; height:100%;"></div>';    
		else			
			e.style.backgroundImage='url('+jsgImgPath+'jsg_bg.gif)';
		e.innerHTML=bg+'<table style="position:absolute; z-index:9999;" id="'+jsgId+'_window" cellspacing=0 cellpadding=0 class="jsg"><tr><td class="header"><a href="javascript:jsgClose();void(0);"><img src="'+jsgImgPath+'jsg_close.gif"></a><span id="'+jsgId+'_title"></span></td></tr><tr><td class="image"><div style="position:relative;" id="'+jsgId+'_image_container"><img src="" id="'+jsgId+'_image"><div style="position:absolute;width:100%;top:20%;left:0;display:none;" class="navcntr" id="'+jsgId+'_navcntr"></div></div></td></tr><tr><td class="footer"><div class="navi" id="'+jsgId+'_navi"></div><span id="'+jsgId+'_desc"></span></td></tr></table>';
		document.body.appendChild(e);
		e=document.getElementById(jsgId);
		var img=document.getElementById(jsgId+'_image');
		if(img.addEventListener)
			img.addEventListener('load',jsgLoad,false);
		else
			img.attachEvent('onreadystatechange',jsgReadyState);
		var img_cont = document.getElementById(jsgId+'_image_container');
		img_cont.onclick=jsgImgClick;			
		img_cont.onmouseover=jsgImgOver;
		img_cont.onmouseout=jsgImgOut;		
		
		//jsgResize();
	}
	e.style.display='';
}

function jsgClose()
{
	var e=document.getElementById(jsgId);
	if(e) {
		e.style.display='none';
		document.getElementById(jsgId+'_image').src='';
	}
	jsgActive=null;
}

function jsgShow(i)
{
	this.current=i;
	var img=this.images[i];	
	document.getElementById(jsgId+'_image').src=typeof(img)=='object' ? img[0] : img;		
	var desc=(this.title.length>0 || this.images.length>1) ? (i+1)+'/'+this.images.length+' '+(typeof(img)=='object' ? img[1] : '') : '';
	var title=(this.title.length>0 || this.images.length>1) ? this.title : typeof(img)=='object' ? img[1] : '';
	var navi = this.images.length>1 ? '<a href="javascript:jsgActive.first();void(0);"><img src="'+jsgImgPath+'jsg_first.gif"></a><a href="javascript:jsgActive.prev();void(0);"><img src="'+jsgImgPath+'jsg_prev.gif"></a><a href="javascript:jsgActive.next();void(0);"><img src="'+jsgImgPath+'jsg_next.gif"></a><a href="javascript:jsgActive.last();void(0);"><img src="'+jsgImgPath+'jsg_last.gif"></a>' : '';
	var navcntr = '';
	if(this.images.length>1){
		navcntr += i!==0 ? '<img style="float:left;border-left:none;" src="'+jsgImgPath+'jsg_arrowl.gif">' : '';
		navcntr += i!=this.images.length-1 ? '<img style="float:right;border-right:none;" src="'+jsgImgPath+'jsg_arrowr.gif">' : '';
	}
	
	document.getElementById(jsgId+'_navi').innerHTML = navi;
	document.getElementById(jsgId+'_navcntr').innerHTML = navcntr;
	document.getElementById(jsgId+'_desc').innerHTML = desc;
	document.getElementById(jsgId+'_title').innerHTML = title;
	
	window.setTimeout(jsgResize,100); //ie6, safari fix
}

function jsgOpen(i)
{
	jsgInit();
	jsgActive=this;	
	this.show(i);
}

function jsgFirst()
{
	this.show(0);
}

function jsgPrev()
{
	if(this.current>0)
		this.show(this.current-1);
}

function jsgNext()
{
	if(this.current<this.images.length-1)
		this.show(this.current+1);
}

function jsgLast()
{
	this.show(this.images.length-1);
}

function jsgFind(i)
{
	var c;
	for(c=0; c<this.images.length; c++)
		if(i==(typeof(this.images[c])=='object' ? this.images[c][0] : this.images[c]))
			return c;
	return null;
}

function JSgallery(g,t)
{
	this.images=g;
	this.title=t;
	this.open=jsgOpen;
	this.show=jsgShow;
	this.first=jsgFirst;
	this.prev=jsgPrev;
	this.next=jsgNext;
	this.last=jsgLast;
	this.find=jsgFind;
	this.move=true;
}

function jsgFindImages(e)
{
	var img=new Array();
	var i,j;
	for(i=0; i<e.childNodes.length; i++)
		if(e.childNodes[i].tagName) {
			if(e.childNodes[i].tagName=='IMG' && e.childNodes[i].onclick) {
				e.childNodes[i].onclick();
				img.push([jsgSrc,e.childNodes[i].title]);
			}
			var img2=jsgFindImages(e.childNodes[i]);
			for(j=0; j<img2.length; j++)
				img.push(img2[j]);
		}
	return img;
}

function jsgClick(i,e,d)
{
	var l=false;
	var jsgTmp;
	if(jsgCallback) {
		jsgSrc=i;
		return;
	}
	if(typeof(e)=='object')
		l=true;
	else
		d=e;
	if(typeof(d)=='undefined')
		d=jsgDefaultId;
	if(l || typeof(jsgGalleries[d])=='undefined') {
		var bl;
		if(l)
			while(e) {
				e=e.parentNode;
				if(e.id==d) {
					bl=e;
					break;
				}
			}
		else
			bl=document.getElementById(d);
		if(!bl)
			return;
		jsgCallback=true;
		var img=jsgFindImages(bl);
		jsgCallback=false;
		jsgTmp=new JSgallery(img,bl.title);
		if(!l)
			jsgGalleries[d]=jsgTmp;
	}
	else
		jsgTmp=jsgGalleries[d];
	jsgTmp.open(jsgTmp.find(i));
}