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

	Rewrite of old code found here: http://slayeroffice.com/code/imageCrossFade/index.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, num=0;

function so_init()
{
	if(!d.getElementById || !d.createElement || d.getElementById('rotator') == null)return;
	d.getElementById('run_slider').value = "true";
	imgs = d.getElementById('flash_L').getElementsByTagName('div');
	for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;
	imgs[0].style.display = 'block';
	imgs[0].xOpacity = .99;
	

	setTimeout(so_xfade,8000);
	
}

function setOpacity(obj)
	{
		if(obj.xOpacity>.99)
		{
			obj.xOpacity = .99;
			return;
		}
		
		obj.style.filter = "alpha(opacity=" + (obj.xOpacity*100) + ")";
		obj.style.MozOpacity = obj.xOpacity;
		obj.style.opacity = obj.xOpacity;
	}

function so_xfade_r()
{
	cOpacity = imgs[current].xOpacity;
	nIndex = imgs[current+1]?current+1:0;
	nOpacity = imgs[nIndex].xOpacity;

	cOpacity-=.09;
	nOpacity+=.09;

	imgs[nIndex].style.display = 'block';
	imgs[current].xOpacity = cOpacity;
	imgs[nIndex].xOpacity = nOpacity;

	setOpacity(imgs[current]);
	setOpacity(imgs[nIndex]);

	if(cOpacity<=0)
	{
		imgs[current].style.display = 'none';
		if(d.getElementById('run_slider').value == "false"){
		d.getElementById('s_start').style.display = '';
		d.getElementById('s_stop').style.display = 'none';
		return;
		}
		current = nIndex;
		
		setTimeout(so_xfade,8000);
	}
	else
	{
		setTimeout(so_xfade_r,85);
	}
	
}
function so_xfade()
{
	if(d.getElementById('run_slider').value == "false"){
		d.getElementById('s_start').style.display = '';
		d.getElementById('s_stop').style.display = 'none';
		return;
	}
	num++;
	if(num == 3){
		update_slider(d.getElementById('loop_arr').value);
		num = 0;
	}
	cOpacity = imgs[current].xOpacity;
	nIndex = imgs[current+1]?current+1:0;
	nOpacity = imgs[nIndex].xOpacity;

	cOpacity=100;
	nOpacity=0;

	imgs[nIndex].style.display = 'block';
	imgs[current].xOpacity = cOpacity;
	imgs[nIndex].xOpacity = nOpacity;

	setOpacity(imgs[current]);
	setOpacity(imgs[nIndex]);

	if(cOpacity<=0)
	{
		imgs[current].style.display = 'none';
		current = nIndex;
		if(d.getElementById('run_slider').value == "false"){
		d.getElementById('s_start').style.display = '';
		d.getElementById('s_stop').style.display = 'none';
		return;
		}
		setTimeout(so_xfade,8000);
	}
	else
	{
		setTimeout(so_xfade_r,85);
	}
	
}

function so_xfade_n()
{
	cOpacity = imgs[current].xOpacity;
	nIndex = imgs[current+1]?current+1:0;
	nOpacity = imgs[nIndex].xOpacity;

	cOpacity-=.09;
	nOpacity+=.09;

	imgs[nIndex].style.display = 'block';
	imgs[current].xOpacity = cOpacity;
	imgs[nIndex].xOpacity = nOpacity;

	setOpacity(imgs[current]);
	setOpacity(imgs[nIndex]);

	if(cOpacity<=0)
	{
		imgs[current].style.display = 'none';
		current = nIndex;
		return;
	}
	else
	{
		setTimeout(so_xfade_n,85);
	}

}

function so_xfade_p()
{
	cOpacity = imgs[current].xOpacity;
	if((current-1) < 0){
	nIndex = imgs.length-1;
	}
	else{
	nIndex = current-1;
	}
	nOpacity = imgs[nIndex].xOpacity;

	cOpacity-=.09;
	nOpacity+=.09;

	imgs[nIndex].style.display = 'block';
	imgs[current].xOpacity = cOpacity;
	imgs[nIndex].xOpacity = nOpacity;

	setOpacity(imgs[current]);
	setOpacity(imgs[nIndex]);

	if(cOpacity<=0)
	{
		imgs[current].style.display = 'none';
		current = nIndex;
		return;
	}
	else
	{
		setTimeout(so_xfade_p,85);
	}

}

function slider_stop()
{
	d.getElementById('run_slider').value = "false";
}

function slider_run()
{
	d.getElementById('run_slider').value = "true";
	d.getElementById('s_start').style.display = 'none';
	d.getElementById('s_stop').style.display = '';
	so_xfade();
}

function slider_next()
{
	d.getElementById('s_start').style.display = '';
	d.getElementById('s_stop').style.display = 'none';
	d.getElementById('run_slider').value = "false";
	so_xfade_n();
}

function slider_prev()
{
	d.getElementById('s_start').style.display = '';
	d.getElementById('s_stop').style.display = 'none';
	d.getElementById('run_slider').value = "false";
	so_xfade_p();
}

function update_slider(loop)
{
	if(loop>0){
	new Ajax.Updater('slider_backup','/indexes/update_slider', {asynchronous:true, evalScripts:true, onComplete: add_slider(), requestHeaders:['X-Update', 'slider_backup']})
	}
}

function add_slider()
{
	var slider_new = d.getElementById('slider_backup').innerHTML;
	imgs = d.getElementById('flash_L').getElementsByTagName('div');
	new Insertion.After(imgs[imgs.length-1],slider_new);
	d.getElementById('slider_backup').innerHTML="";
	imgs = d.getElementById('flash_L').getElementsByTagName('div');
	for(i=1;i<imgs.length;i++){
		if(i != current){
		imgs[i].xOpacity = 0;
		}
	}
	d.getElementById('loop_arr').value = d.getElementById('loop_arr').value-1;
}