var finished = false;
var i = 0;
function ike_slideshow( slideshow_id, jump ) {
slideshow = document.getElementById( slideshow_id );
images = slideshow.getElementsByTagName( "li" );
finished=false;
for(i=0;i<images.length;i++){
if(finished) break;
if(images[i].style.display=="block") {
if((i==0&&jump==-1)||(i+1==images.length&&jump==1)) break;
images[i+jump].style.display="block";
images[i].style.display="none";
finished=true;
}
}
}