/* SlideShow v1.0, Copyright (c) 2007, Innovative Way. */
/* Based on Image Cross Fade Redux by steve@slayeroffice.com */

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, clientbrowser="", clientbrowserver="";

var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();

clientbrowser=BrowserDetect.browser;
clientbrowserver=BrowserDetect.version;

//alert(clientbrowser);

function so_init()
{
	if (!d.getElementById || !d.createElement) return;

	// add reference to slideshow2.css in the <head />
	css = d.createElement('link');
	css.setAttribute('href','/styles/slideshow2.css');
	css.setAttribute('rel','stylesheet');
	css.setAttribute('type','text/css');
	d.getElementsByTagName('head')[0].appendChild(css);

	if (d.getElementById('rotator') != null)
	{
		if (d.getElementById('rotator').getElementsByTagName('img') != null)
		{
			// for all images in rotator div (except to first image), set xOpacity to 0
			imgs = d.getElementById('rotator').getElementsByTagName('img');

			for (i=1; i<imgs.length; i++) 
			{
				imgs[i].xOpacity = 0;
			}
			
			imgs[0].style.display = 'block';
			imgs[0].xOpacity = .99;

			setTimeout(so_xfade,500);
		}
	}
}

function so_xfade()
{
	if (current == 0)
	{
		imgs[0].style.display = 'none';
	}

	cOpacity = imgs[current].xOpacity;
	// skip the first image on loop, this allows the first image to be a loading image
	nIndex = imgs[current+1]?current+1:1;
	nOpacity = imgs[nIndex].xOpacity;

	if ( (clientbrowser == "Explorer") )
	{
		cOpacity-=.07;
		nOpacity+=.07;
	}
	else
	{
		cOpacity-=.05;
		nOpacity+=.05;
	}

	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;
		setTimeout(so_xfade,4000);
	}
	else
	{
		setTimeout(so_xfade,30);
	}

	function setOpacity(obj)
	{
		if(obj.xOpacity>.99)
		{
			obj.xOpacity = .99;
			return;
		}

		obj.style.opacity = obj.xOpacity;
		obj.style.MozOpacity = obj.xOpacity;
		if (obj.xOpacity >= .79)
		{
			obj.style.filter = '';
		}
		else
		{
			obj.style.filter = 'alpha(opacity=' + (obj.xOpacity*100) + ')';
		}
	}
}

