var dto=null;
function parties() {
window.clearTimeout(dto);
document.getElementById('home_parties').style.backgroundPosition='0 -470px';
document.getElementById('home_weddings').style.backgroundPosition='0 -470px'; 
document.getElementById('home_exhibitions').style.backgroundPosition='0 -470px';
}
function weddings() {
window.clearTimeout(dto);
document.getElementById('home_parties').style.backgroundPosition='0 -235px';
document.getElementById('home_weddings').style.backgroundPosition='0 -235px'; 
document.getElementById('home_exhibitions').style.backgroundPosition='0 -235px';
}
function exhibitions() {
window.clearTimeout(dto);
document.getElementById('home_parties').style.backgroundPosition='0 -705px';
document.getElementById('home_weddings').style.backgroundPosition='0 -705px'; 
document.getElementById('home_exhibitions').style.backgroundPosition='0 -705px';
}
function all() {
window.clearTimeout(dto);
document.getElementById('home_parties').style.backgroundPosition='0 0px';
document.getElementById('home_weddings').style.backgroundPosition='0 0px'; 
document.getElementById('home_exhibitions').style.backgroundPosition='0 0px';
}
function out(){
light=Math.random();
if(light<0.25){
parties();
}else if(light<0.5){
all();
}else if(light<0.75){
weddings();
}else{
exhibitions();
}
dto = window.setTimeout("out();",1000);
}
window.onload=out;