jQuery.preloadImages = function()
{
  for(var i = 0; i<arguments.length; i++)
  {
    jQuery("<img>").attr("src", arguments[i]);
  }
}

$(function() {
$('#banner_img').cycle({ 
    fx:    'fade', 
    speed:  2500,
	timeout:  2000  
 });
 
 $('#main_column_banner1').cycle({ 
    fx:    'fade', 
    speed:  2500,
	timeout:  2000  
 });
 
 });

var timeout = 500;
var closetimer = 0;
var ddmenuitem = 0;

function rtianav_open()
{  rtianav_canceltimer();
   rtianav_close();
   ddmenuitem = $(this).find('ul').css('visibility', 'visible');}

function rtianav_close()
{  if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');}

function rtianav_timer()
{  closetimer = window.setTimeout(rtianav_close, timeout);}

function rtianav_canceltimer()
{  if(closetimer)
   {  window.clearTimeout(closetimer);
      closetimer = null;}}

$(document).ready(function()
{  $('#rtianav > li').bind('mouseover', rtianav_open)
   $('#rtianav > li').bind('mouseout',  rtianav_timer)});

document.onclick = rtianav_close;