function doPreload()
{
   var the_images = new Array('images/nav_01_o.gif','images/nav_02_o.gif','images/nav_03_o.gif','images/nav_04_o.gif','images/nav_05_o.gif','images/nav_06_o.gif');
   preloadImages(the_images);
}

function preloadImages(the_images_array) {

   for(var loop = 0; loop < the_images_array.length; loop++)
   {
 	var an_image = new Image();
	an_image.src = the_images_array[loop];
   }
}