Event.observe(window, 'load', function(){
   if($('ant_art')){
      var ants = $$('#ant_art div.ant_art_princ');
      for(var i=0;i<ants.length;i++){
	 if(i%3==0 && i>0){
	    ants[i].insert({before:'<p class="ant_art_clear"></p>'});   
	 }
      }
      $('ant_art').setStyle('display:block;');
   }   
});

function showHide(id){
   var a = $('d_'+ id);
   if(!a.visible()) new Ajax.Request(ajax_base, {
      parameters: {ajax:'menu', type:id.substr(0,1), id:id.substr(4)},
      onSuccess: function(res){
         a.update(res.responseText);    
	 $(id).addClassName('enh');
         Effect.BlindDown(a,{duration:0.5})
      } 
    });
    else Effect.BlindUp(a,{duration:0.1, afterFinish:function(){ $(id).removeClassName('enh'); }})
}