//*****
//***** Dit bestand bevat een aantal handige javascriptfuncties die gebruikt kunnen
//***** worden door de hele appliactie heen.
//*****
//***** Bram Crins - RealDesign
//*****

//standaard variabelen en instellingen


var breedte = 750;
var hoogte = 500; 
var midX;
var midY;
var browser = '';

/*****

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


*****/


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

var d=document;
var imgs = new Array();
var imgs2 = new Array();
var imgs3 = new Array();
var zInterval = null;
var current=0;
var current2=0;
var current3=0;
var pause=false;

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;
	imgs[0].style.display = "block";
	imgs[0].xOpacity = .99;

	imgs2 = d.getElementById("imageContainer2").getElementsByTagName("img");
	for(i=1;i<imgs2.length;i++) imgs2[i].xOpacity = 0;
	imgs2[0].style.display = "block";
	imgs2[0].xOpacity = .99;

	imgs3 = d.getElementById("imageContainer3").getElementsByTagName("img");
	for(i=1;i<imgs3.length;i++) imgs3[i].xOpacity = 0;
	imgs3[0].style.display = "block";
	imgs3[0].xOpacity = .99;
	
	setTimeout(so_xfade,2000);
	setTimeout(so_xfade2,3000);
	setTimeout(so_xfade3,2500);

}

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(cOpacity<=0) {
		imgs[current].style.display = "none";
		current = nIndex;
		setTimeout(so_xfade,2000);
	} 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) + ")";
}

function so_xfade2()
{
	cOpacity = imgs2[current2].xOpacity;
	nIndex = imgs2[current2+1]?current2+1:0;
	nOpacity = imgs2[nIndex].xOpacity;
	
	cOpacity-=.05; 
	nOpacity+=.05;
	
	imgs2[nIndex].style.display = "block";
	imgs2[current2].xOpacity = cOpacity;
	imgs2[nIndex].xOpacity = nOpacity;
	
	setOpacity(imgs2[current2]); 
	setOpacity(imgs2[nIndex]);
	
	if(cOpacity<=0)
	{
		imgs2[current2].style.display = "none";
		current2 = nIndex;
		setTimeout(so_xfade2,3000);
	}
	else
	{
		setTimeout(so_xfade2,50);
	}	
	
}

function so_xfade3()
{
	cOpacity = imgs3[current3].xOpacity;
	nIndex = imgs3[current3+1]?current3+1:0;
	nOpacity = imgs3[nIndex].xOpacity;
	
	cOpacity-=.05; 
	nOpacity+=.05;
	
	imgs3[nIndex].style.display = "block";
	imgs3[current3].xOpacity = cOpacity;
	imgs3[nIndex].xOpacity = nOpacity;
	
	setOpacity(imgs3[current3]); 
	setOpacity(imgs3[nIndex]);
	
	if(cOpacity<=0)
	{
		imgs3[current3].style.display = "none";
		current3 = nIndex;
		setTimeout(so_xfade3,2500);
	}
	else
	{
		setTimeout(so_xfade3,50);
	}	
	
}
		
function checkIt(string)
{	//functie voor eht bepalen van de broser
	var detect = navigator.userAgent.toLowerCase();
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}

			
function SetBrowser()
{	//testen welke browser gebruikt wordt	
	if (checkIt('konqueror'))
	{
		browser = "Konqueror";
	}
	//else if (checkIt('safari')) browser = "Safari"
	//else if (checkIt('omniweb')) browser = "OmniWeb"	
	//else if (checkIt('webtv')) browser = "WebTV";
	//else if (checkIt('icab')) browser = "iCab"
	//else if (checkIt('msie')) browser = "Internet Explorer"
	else if (checkIt('opera')) browser = "OP"
	else if (!checkIt('compatible'))
	{
		browser = "FF"
	}
	else browser = "IE";
}

function SetDefaults()
{	//berekend de standaard waardes waarmee de positie van de andere objecten aan gehangen wordt
					
	//achterhalen wat voor browser we hebben
	if (browser == '')
	{
		SetBrowser();
	}
				
	//beschikbare breedte bepalen
	midX = document.body.offsetWidth;				
	midY = document.body.offsetHeight;

	//correctie voor minimum afstand.
	if (midX < 750)
	{
		midX = 750;
	}
	if (midY < 500)
	{
		midY = 500;
	}
				
	//midden bepalen
	midX = midX/2;				
	midY = midY/2;

				
	//correctie voor de verschillende browsers, standaard IE
	//if (browser == 'IE')
	//{
	//	midX = midX
	//	midY = midY
	//}
	if (browser == 'OP')
	{	//Opera
		midX = midX + 10
		midY = midY + 2
	}
	if (browser == 'FF')
	{	//Firefox
		midX = midX + 10
		midY = midY + 1
	}	
}