var teaserButtonOn = new Array();
var teaserPic = 0;

function preloadImages() {
    if (document.images) 
	{
        teaserButtonOn[0] = new Image();
        teaserButtonOn[0].src = "fotos/bvs_01.jpg";
        teaserButtonOn[1] = new Image();
        teaserButtonOn[1].src = "fotos/01.jpg";
		teaserButtonOn[2] = new Image();
        teaserButtonOn[2].src = "fotos/02.jpg";
    }
    window.setTimeout("changeTeaser()", 3000);
}

function changeTeaser()
{
    teaserPic++;
    if (teaserPic >= teaserButtonOn.length)
    {
        teaserPic = 0;
    }

	if (document.all && navigator.userAgent.indexOf("Opera") == -1) {
		document.all.teaser.filters.blendTrans.Apply();
		document.all.teaser.src = teaserButtonOn[teaserPic].src;
		document.all.teaser.filters.blendTrans.Play();
	    window.setTimeout("changeTeaser()", 6000);
	} else {
	    document.teaser.src = teaserButtonOn[teaserPic].src;	    
	    window.setTimeout("changeTeaser()", 3000);
	}
}