var i = 0
var num = 0
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

var preloadFlag = false;

function preloadImages() {
	if (document.images) {
		titulObr1_1 = newImage("img/js-titul/obr1-1.jpg");
		titulObr2_1 = newImage("img/js-titul/obr2-1.jpg");
		titulObr3_1 = newImage("img/js-titul/obr3-1.jpg");
		titulObr4_1 = newImage("img/js-titul/obr4-1.jpg");
		titulObr5_1 = newImage("img/js-titul/obr5-1.jpg");
		titulObr6_1 = newImage("img/js-titul/obr6-1.jpg");
		titulObr7_1 = newImage("img/js-titul/obr7-1.jpg");
		titulObr8_1 = newImage("img/js-titul/obr8-1.jpg");
		preloadFlag = true;
		Obr1 = setInterval("changeImg()",1300)
	}
}


//	'uvod_01', 'obrazy/uvod_01-uvod_Welcome_pres.jpg'
function changeImg() {
	if (document.images && (preloadFlag == true)) {
		
		while (i == num){
			num = Math.round(Math.random()*7)+1
		/*	num = num+1 */
		}
		i=num;
		obrDest = eval("document['titulObr"+num+"']");
		if (obrDest.src.indexOf('1.jpg')>0) {
			num2=0
		}else{
			num2=1
		}
		obrSrc = eval("'img/js-titul/obr"+num+"-"+num2+".jpg'")
		obrDest.src = obrSrc;
	}
}