window.addEvent('domready', function() {

var numpics = 5
var whichpic = 1;

var myTimedFunction = function (){

if(whichpic!=numpics){
var nextpic = whichpic+1;
} else {
nextpic = 1;
}

$('banner'+nextpic).tween('opacity', 1);
		$('banner'+whichpic).tween('opacity', 0);



      if(whichpic!=numpics){
      whichpic = nextpic;
      } else {
      whichpic = 1;
      }

}


myTimedFunction.periodical(5000);
		
});