var flag1 = true;
var nrAct = 0;
var running = false;
var pictureCount = 9;
var faderSrc = "fileadmin/fader/";

function changePictureRandom(amount) {
	var el = $('header-middle');
	var el2 = $('header-middle2');
	var nr = 0;
	var logoSrc;
	do  {
		nr = Math.floor(Math.random()*amount);
	}while( nr == nrAct )
	nrAct = nr;
	nr++;	
	logoSrc = faderSrc + nr + ".jpg";
	if ( flag1 ) {
		el2.style.background = "url("+logoSrc+")";
		el2.fade({ duration: 2.0, to: 0.99 });
		el.fade({ duration: 2.0, to: 0.01 });		
		flag1 = false;	
	}
	else {
		el.style.background = "url("+logoSrc+")";
		el.fade({ duration: 2.0,  to: 0.99 });	
		el2.fade({ duration: 2.0,  to: 0.01 });
		flag1 = true;	
	}
}
function fadeOnce() {
	var el = $('header-middle');
	var el2 = $('header-middle2');
	var nr = 1;
	var logoSrc;
	logoSrc = faderSrc + nr + ".jpg";
	//alert(logoSrc);
	el2.style.background = "url("+logoSrc+")";
	el2.fade({ duration: 2.0, to: 0.99 });
}
function writeText() {
	changePictureRandom(pictureCount);
}

function startFader() {
	if ( pictureCount == 1 ) {
		window.setInterval("fadeOnce()",3000);
	}
	else {
		running = window.setInterval("writeText()",4000);
	}
}

function pause() {
	if (running) {
		running = window.clearInterval(running);
	}
	else {
		startFader();
	}
}