var c=0
var s
function photoGallery()
{
if (c%5==0){
document.getElementById('photo-gallery').src = "photos/IMG_5611.JPG";
document.getElementById("title").innerHTML='   參觀香港藝術館   ';
}
if (c%5==1){
document.getElementById('photo-gallery').src = "photos/IMG_1781.JPG";
document.getElementById("title").innerHTML='   家教會週年大會   ';
}
if (c%5==2){
document.getElementById('photo-gallery').src = "photos/IMG_4377.JPG";
document.getElementById("title").innerHTML='   戲劇組頒獎禮   ';
}
if (c%5==3){
document.getElementById('photo-gallery').src = "photos/IMG_5579.JPG";
document.getElementById("title").innerHTML='   紅十字會宣誓典禮   ';
}
if (c%5==4){
document.getElementById('photo-gallery').src = "photos/IMG_0449.JPG";
document.getElementById("title").innerHTML='   一人一花   ';
}
c=c+1
s=setTimeout("photoGallery()",6000)
}