// teaser script
function teaser_update (id) {
	if (id == '0') {
		changeOpac(50,'teaser1');
		changeOpac(50,'teaser2');
	} else if (id == '1') {
		changeOpac(50,'teaser0');
		changeOpac(50,'teaser2');
	} else if (id == '2') {
		changeOpac(50,'teaser0');
		changeOpac(50,'teaser1');
	}
	opacity('teaser' + id,50,100,1000);

	blendimage('teaser_big','teaserpic_big','' + pix[id] + '',300);

	return false;
}


function teaser_reset () {
	//blendimage('teaser_big','teaserpic_big','/img/test/intro.jpg',500);
	return true;
}

function opacity(id, opacStart, opacEnd, millisec) {
    var speed = Math.round(millisec / 100);
    var timer = 0;

    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}

function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
} 

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	changeOpac(0, imageid);
	
	document.getElementById(imageid).src = imagefile;

	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}