/*****

Image Cross Fade Redux
Version 1.0
Last revision: 02.15.2006
steve@slayeroffice.com

Please leave this notice intact. 

Rewrite of old code found here: http://slayeroffice.com/code/imageCrossFade/index.html


*****/
/*
	02.19.2007: Modified for pausing by Waki Ryuzo.
	http://www.riuz.com/ualbum/ualbum.html
*/
	
window.addEventListener?window.addEventListener("load",so_init,false):window.attachEvent("onload",so_init);

var d=document, imgs = new Array(), zInterval = null, current=0, pause=false, navi ;

function so_init() {
	if(!d.getElementById || !d.createElement)return;

	css = d.createElement("link");
	css.setAttribute("href","xfade2.css");
	css.setAttribute("rel","stylesheet");
	css.setAttribute("type","text/css");
	d.getElementsByTagName("head")[0].appendChild(css);

	imgs = d.getElementById("imageContainer").getElementsByTagName("img");
	// for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;

	// by wriu --start--
	navi = d.createElement("img") ;
	navi.setAttribute("src", d.getElementById("navi").getAttribute("pause"));
	navi.setAttribute("onClick", "so_startStop()");
	d.getElementById("navi").appendChild(navi);
	var w = d.getElementById("imageContainer").getAttribute("width") ;
	var h = d.getElementById("imageContainer").getAttribute("height") ;
	for(i=0;i<imgs.length;i++) {
		imgs[i].xOpacity = 0;
		imgs[i].style.left = String((w-imgs[i].getAttribute("width"))/2) + "px" ;
		imgs[i].style.top = String((h-imgs[i].getAttribute("height"))/2) + "px" ;
	}
	d.getElementById("caption").innerHTML = "[ 1/"+imgs.length+" ] "+imgs[0].getAttribute("alt");
	d.getElementById("description").innerHTML = imgs[0].getAttribute("desc");
	// by wriu --end--
	
	imgs[0].style.display = "block";
	imgs[0].xOpacity = .99;
	setTimeout(so_xfade,2000);
}
// by wriu --start--
function so_startStop()
{
	if ( pause ) {
		pause = false  ;
		setTimeout(so_xfade,100);
		navi.setAttribute("src", d.getElementById("navi").getAttribute("pause")) ;
	} else {
		pause = true  ;
		navi.setAttribute("src", d.getElementById("navi").getAttribute("play")) ;
	}
}
// by wriu --end--
function so_xfade() {
	cOpacity = imgs[current].xOpacity;
	nIndex = imgs[current+1]?current+1:0;
	nOpacity = imgs[nIndex].xOpacity;
	
	cOpacity-=.05; 
	nOpacity+=.05;
	
	imgs[nIndex].style.display = "block";
	imgs[current].xOpacity = cOpacity;
	imgs[nIndex].xOpacity = nOpacity;
	
	setOpacity(imgs[current]); 
	setOpacity(imgs[nIndex]);
	
	if ( ! pause ) {
		if(cOpacity<=0) {
			imgs[current].style.display = "none";
			current = nIndex++;
			cur = current+1;
			d.getElementById("caption").innerHTML = "[ "+cur+"/"+imgs.length+" ] "+imgs[current].getAttribute("alt");
			d.getElementById("description").innerHTML = imgs[current].getAttribute("desc");
			if ( current ) {
				setTimeout(so_xfade,2000);
			} else {
				so_startStop();
			}
		} else {
			setTimeout(so_xfade,50);
		}
	}
	
	function setOpacity(obj) {
		if(obj.xOpacity>.99) {
			obj.xOpacity = .99;
			return;
		}
		obj.style.opacity = obj.xOpacity;
		obj.style.MozOpacity = obj.xOpacity;
		obj.style.filter = "alpha(opacity=" + (obj.xOpacity*100) + ")";
	}
	
}