var slides = new Array();
var cur_counter = 0;


function startSlider() {
  sildes = new Array();
  
  var divs = document.getElementsByClassName('slide_imgs');
  for(var a = 0; a < divs.length; a++ ) {
      slides.push(divs[a].id);
  }

 if(slides.length > 1) { setInterval("slide_image()", 5000); } else { return false; }  
}

function slide_image () {

  new Effect.Fade(slides[cur_counter], { duration:1, from:1.0, to:0.0 });
  cur_counter++;
  if (cur_counter == slides.length) cur_counter = 0;
  new Effect.Appear(slides[cur_counter], { duration:1, from:0.0, to:1.0 });

}