/*
	Image Cross Fade Redux
*/

window.addEventListener?window.addEventListener('load',so_init,false):window.attachEvent('onload',so_init);

var d=document, eventImgs = new Array(), eventInterval = 7000, townInterval = 4000, eventCurrent=0, townCurrent=0;

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

    //get the CSS
	css = d.createElement('link');
	css.setAttribute('href','../style/slideshow2.css');
	css.setAttribute('rel','stylesheet');
	css.setAttribute('type','text/css');
	d.getElementsByTagName('head')[0].appendChild(css);

    //event images
    eventCurrent = Math.floor(Math.random()*5) //random starting point
	eventImgs = d.getElementById('rotator_events').getElementsByTagName('img');
	for(i=0;i<eventImgs.length;i++) eventImgs[i].xOpacity = 0;
	eventImgs[eventCurrent].style.display = 'block';
	eventImgs[eventCurrent].xOpacity = .99;
	setTimeout(event_xfade,eventInterval);
	
	//town images
    townCurrent = Math.floor(Math.random()*8) //random starting point	
	townImgs = d.getElementById('rotator_towns').getElementsByTagName('img');
	for(i=0;i<townImgs.length;i++) townImgs[i].xOpacity = 0;
	townImgs[townCurrent].style.display = 'block';
	townImgs[townCurrent].xOpacity = .99;
	setTimeout(town_xfade,townInterval);
}

function event_xfade()
{
	cOpacity = eventImgs[eventCurrent].xOpacity;
	nIndex = eventImgs[eventCurrent+1]?eventCurrent+1:0;
	nOpacity = eventImgs[nIndex].xOpacity;

	cOpacity-=.05;
	nOpacity+=.05;

	eventImgs[nIndex].style.display = 'block';
	eventImgs[eventCurrent].xOpacity = cOpacity;
	eventImgs[nIndex].xOpacity = nOpacity;

	setOpacity(eventImgs[eventCurrent]);
	setOpacity(eventImgs[nIndex]);

	if(cOpacity<=0)
	{
		eventImgs[eventCurrent].style.display = 'none';
		eventCurrent = nIndex;
		setTimeout(event_xfade,eventInterval);  //this is the rotation time
	}
	else
	{
		setTimeout(event_xfade,50);
	}


}
	
function town_xfade()
{
	cOpacity = townImgs[townCurrent].xOpacity;
	nIndex = townImgs[townCurrent+1]?townCurrent+1:0;
	nOpacity = townImgs[nIndex].xOpacity;

	cOpacity-=.05;
	nOpacity+=.05;

	townImgs[nIndex].style.display = 'block';
	townImgs[townCurrent].xOpacity = cOpacity;
	townImgs[nIndex].xOpacity = nOpacity;

	setOpacity(townImgs[townCurrent]);
	setOpacity(townImgs[nIndex]);

	if(cOpacity<=0)
	{
		townImgs[townCurrent].style.display = 'none';
		townCurrent = nIndex;
		setTimeout(town_xfade,townInterval);  //this is the rotation time
	}
	else
	{
		setTimeout(town_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) + ')';
}