// dia v01.00
// copyright 2010 by büro-d

var diaZeit    = 4000; // sekunden * 1000
var diaBlenden = 1600; // sekunden * 1000
var diaAnz  = 9;
//
var diaNo	= 1;
var diaAkt	= "a"; 
var diaPreload = new Array();
var diaPreloadFlag = false;


function dia_init() {
	setTimeout("dia_wechsel();", 2500);
}

function dia_wechsel() {
	// nächstes dia
	diaNo++;
	if (diaNo> diaAnz) {
		diaNo = 1;
	}
	//
	if (diaAkt == "a") {
		diaAkt = "b";
	} else {
		diaAkt = "a";
	}
	//
	bld_wechsel('dia-'+diaAkt, './images/willkommen/0'+diaNo+'.jpg');
	if (diaAkt == "b") {
		$('#dia-a').animate({opacity: 0}, diaBlenden, 'swing');
	} else {
		$('#dia-a').animate({opacity: 1}, diaBlenden, 'swing');
	}
	//
	aktionA = setTimeout("dia_vorladen();", diaBlenden);
	aktionB = setTimeout("dia_wechsel();", diaZeit);
}

function dia_vorladen() {
	if (document.images) {
		if (diaNo+1 <= diaAnz && diaPreloadFlag == false) {
			diaN = diaNo+1;
			diaPreload[diaN] = bld_neu('./images/willkommen/0'+diaN+'.jpg');
			// alert("preload ./willkommen/0"+diaN+".jpg");
		} else {
			diaPreloadFlag = true;
		}
	}
}