/*****

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

Pretty much re-written to cope with various differences
by Paul najman 18/05/2009

*****/

var so_xfade_tags = new Array();
var so_xfade_current = 0;
var so_xfade_next = 0;
var so_xfade_timeout_id = false;

function so_xfade_pause_slides() {
	if(so_xfade_timeout_id){
		clearTimeout(so_xfade_timeout_id)
	}
	so_xfade_next = so_xfade_tags[so_xfade_current+1]? so_xfade_current+1: 0;
	if(so_xfade_tags[so_xfade_current].xOpacity > 0.5){
		so_xfade_tags[so_xfade_current].style.display = "block";
		so_xfade_tags[so_xfade_current].xOpacity = 1.0;
		so_xfade_tags[so_xfade_next].style.display = "none";
		so_xfade_tags[so_xfade_next].xOpacity = 0;
	} else {
		so_xfade_tags[so_xfade_current].style.display = "none";
		so_xfade_tags[so_xfade_current].xOpacity = 0;
		so_xfade_tags[so_xfade_next].style.display = "block";
		so_xfade_tags[so_xfade_next].xOpacity = 1.0;
		so_xfade_current = so_xfade_next;
	}

	setOpacity(so_xfade_tags[so_xfade_current]); 
	setOpacity(so_xfade_tags[so_xfade_next]);
}
function so_xfade_next_slide(){
	if(so_xfade_timeout_id){
		clearTimeout(so_xfade_timeout_id)
	}

	so_xfade_timeout_id = setTimeout(so_xfade, 0);
}
function so_xfade() {
	so_xfade_next = so_xfade_tags[so_xfade_current+1]? so_xfade_current+1: 0;
	cOpacity = so_xfade_tags[so_xfade_current].xOpacity;
	nOpacity = so_xfade_tags[so_xfade_next].xOpacity;
	cOpacity -= so_xfade_dt; 
	nOpacity += so_xfade_dt;
	so_xfade_tags[so_xfade_next].style.display = "block";
	so_xfade_tags[so_xfade_current].xOpacity = cOpacity;
	so_xfade_tags[so_xfade_next].xOpacity = nOpacity;
	setOpacity(so_xfade_tags[so_xfade_current]); 
	setOpacity(so_xfade_tags[so_xfade_next]);
	if(cOpacity <= 0) {
		so_xfade_tags[so_xfade_current].style.display = "none";
		so_xfade_current = so_xfade_next;
		if(so_xfade_timeout_id){
			clearTimeout(so_xfade_timeout_id)
		}
		so_xfade_timeout_id = setTimeout(so_xfade, so_xfade_delay);
	} else {
		if(so_xfade_timeout_id){
			clearTimeout(so_xfade_timeout_id)
		}
		so_xfade_timeout_id = setTimeout(so_xfade, 50);
	}
}
function setOpacity(obj) {
	if(obj.xOpacity > 1.0) {
		obj.xOpacity = 1.0;
	} else if(obj.xOpacity < 0.0){
		obj.xOpacity = 0.0;
	}
	obj.style.opacity = obj.xOpacity == 0.0? '0.0': ''+obj.xOpacity+'';
	obj.style.MozOpacity = obj.xOpacity;
	obj.style.filter = "alpha(opacity=" + (obj.xOpacity*100) + ")";
}