function preloadRollovers()
{
	// if javascript is enabled, this preloads rollover images
	if (document.images)
	{
		var preload_image_object = new Image();
		image_url = new Array();
    	image_url[0] = "images/nav_AboutUs_h.gif";
    	image_url[1] = "images/nav_BusinessVoIP_h.gif";
    	image_url[2] = "images/nav_DedicatedInternet_h.gif";
    	image_url[3] = "images/nav_ISDN_PRI_h.gif";
		image_url[4] = "images/nav_MPLS_h.gif";
		image_url[5] = "images/nav_PrivateLine_h.gif";

    	var i = 0;
    	for(i=0; i<=image_url.length; i++) 
		{
			preload_image_object.src = image_url[i];
		}
	}
}
preloadRollovers();