var SlideShow = function() {
    var interval;
    var currentFrame=0;
    var lis;

   var show = function() {
  	if (lis) {		
		YAHOO.util.Dom.setStyle(lis[currentFrame],'display','none');
		currentFrame++;
		if (currentFrame>lis.length-1) currentFrame=0;
		YAHOO.util.Dom.setStyle(lis[currentFrame],'display','block');
	}
	setTimeout(show,interval);
   };

   return {
        	init : function() {
	    	var f=document.getElementById('slideshow-form-init');
		if (f) {
			interval=f.interval.value;
		} else {
			interval=1000;
		}
		var fs=document.getElementById('slideshow');
		lis=fs.getElementsByTagName('li');
		show();
	}
  };

}();

YAHOO.ext.EventManager.onDocumentReady(SlideShow.init, SlideShow, true);