var c=0
var s
function photoSildeshow() {
if (c % 2 == 0) {
	document.getElementById('photo_slideshow').src = "http://www.lbcc.edu/TDF/images/tdfbanner.jpg";
}
if (c % 2 == 1) {
	document.getElementById('photo_slideshow').src = "http://www.lbcc.edu/TDF/images/tdf_banner3.jpg";
}

c=c+1
s=setTimeout("photoSildeshow()",5000);
}
window.onload = photoSildeshow;