// Playback JavaScript

/* Common:favicon */
da_image = new Image();
da_image.src="/favicon.ico";

/* auto-scroll */
Event.observe(window, 'load', function() {
  $$('a[href^=#]:not([href=#])').each(function(element) {
    element.observe('click', function(event) {
      new Effect.ScrollTo(this.hash.substr(1));
      Event.stop(event);
    }.bindAsEventListener(element))
  })
})


function seta(){
document.getElementById("thumb-a").style.display = "block";
}
function offa(){
document.getElementById("thumb-a").style.display = "none";
}
function setb(){
document.getElementById("thumb-b").style.display = "block";
}
function offb(){
document.getElementById("thumb-b").style.display = "none";
}
function setc(){
document.getElementById("thumb-c").style.display = "block";
}
function offc(){
document.getElementById("thumb-c").style.display = "none";
}
function setd(){
document.getElementById("thumb-d").style.display = "block";
}
function offd(){
document.getElementById("thumb-d").style.display = "none";
}