function showNav(id){
					
      var e;
        for (var i=0;i<document.getElementsByTagName('div').length;i++)
        {
                e = document.getElementsByTagName('div')[i];
                if(e.id.indexOf("menuindex")>-1) e.style.display='none';
        }
	    
		Effect.BlindDown(id, {duration:0.5});
		return false;		

}