var next=document.getElementById("next");var prev=document.getElementById("prev");var thumbnails=document.getElementById("thumbnails").getElementsByTagName("IMG");function updateThumbnails(num){for(var i=0;i<thumbnails.length;i+=1){if(i===num){DOM.addClass(thumbnails[i],"selected");}else{DOM.removeClass(thumbnails[i],"selected");}}}
function slideshowChanged(slideNum){updateThumbnails(slideNum);}
function slideshowUpdated(slideNum){if(SLIDESHOW.first()){DOM.addClass(prev,"hidden");}else{DOM.removeClass(prev,"hidden");}
if(SLIDESHOW.last()){DOM.addClass(next,"hidden");}else{DOM.removeClass(next,"hidden");}}
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