//Timeout your Mouseovers (http://www.pjhyett.com/articles/2006/07/05/timeout-your-mouseovers)

var s_nav = {
 timeout : null,
 showPopup : function(){
  clearTimeout(this.timeout);
  if($('s_nav').style.display == 'none'){
   this.timeout = setTimeout(function(){new Effect.BlindDown('s_nav', {duration:.4, fps:40})},100);
  }
 },
 hidePopup : function(){
  if($('s_nav').style.display == 'none'){
   clearTimeout(this.timeout);
  }else{
   this.timeout = setTimeout(function(){new Effect.BlindUp('s_nav', {duration:.4, fps:40})},400);
  }
 }
}