function setCurrentImage () {

eval("document." + catg_image[cat_id] + ".src = " + "on_images[" + cat_id + "]");

}

var catg_image = new Array ('front','agency','assoc','btob','catalog','circulation','db','hitech','opinion','financial','fundraising','health','drtv','intl','net','legal','list','postal','print','tele','searchengine');

      var off_images = new Array(
'/images/lnav_frontpg_off.gif' ,
'/images/lnav_agncy_off.gif',
'/images/lnav_assoc_off.gif',
'/images/lnav_b2b_off.gif',
'/images/lnav_cat_off.gif',
'/images/lnav_circu_off.gif',
'/images/lnav_db_off.gif',
'/images/lnav_dmhitc_off.gif',
'/images/lnav_edop_off.gif',
'/images/lnav_fincl_off.gif',
'/images/lnav_fund_off.gif',
'/images/lnav_hcare_off.gif',
'/images/lnav_infom_off.gif',
'/images/lnav_intrntl_off.gif',
'/images/lnav_intnet_off.gif',
'/images/lnav_legal_off.gif',
'/images/lnav_list_off.gif',
'/images/lnav_post_off.gif',
'/images/lnav_prod_off.gif',
'/images/lnav_tele_off.gif',
'/images/lnav02_aboutus_off.gif',
'/images/lnav02_calendar_off.gif',
'/images/lnav02_DMQ_off.gif',
'/images/lnav02_offlinersc_off.gif',
'/images/lnav02_searchnews_off.gif',
'/images/tnav_adv_off.gif',
'/images/tnav_arch_off.gif',
'/images/tnav_clsfd_off.gif',
'/images/tnav_listdir_off.gif',
'/images/tnav_subscrb_off.gif',
'/images/tnav_yelpgs_off.gif',
'/images/lnav_searchengine_off.gif',
'/images/lnav_circulation_off.gif'
);

        var on_images = new Array( 
'/images/lnav_frontpg_on.gif',
'/images/lnav_agncy_on.gif',
 '/images/lnav_assoc_on.gif',
'/images/lnav_b2b_on.gif',
'/images/lnav_cat_on.gif',
'/images/lnav_circu_on.gif',
'/images/lnav_db_on.gif',
'/images/lnav_dmhitc_on.gif',
'/images/lnav_edop_on.gif',
'/images/lnav_fincl_on.gif',
'/images/lnav_fund_on.gif',
'/images/lnav_hcare_on.gif',
'/images/lnav_infom_on.gif',
'/images/lnav_intrntl_on.gif',
'/images/lnav_intnet_on.gif',
'/images/lnav_legal_on.gif',
'/images/lnav_list_on.gif',
'/images/lnav_post_on.gif',
'/images/lnav_prod_on.gif',
'/images/lnav_tele_on.gif',
'/images/lnav02_aboutus_on.gif',
'/images/lnav02_calendar_on.gif',
'/images/lnav02_DMQ_on.gif',
'/images/lnav02_onlinersc_on.gif',
'/images/lnav02_searchnews_on.gif',
'/images/tnav_adv_on.gif',
'/images/tnav_arch_on.gif',
'/images/tnav_clsfd_on.gif',
'/images/tnav_listdir_on.gif',
'/images/tnav_subscrb_on.gif',
'/images/tnav_yelpgs_on.gif',
'/images/lnav_searchengine_on.gif',
'/images/lnav_circulation_on.gif'
);


function doPreload()

{
        preloadImages(on_images);
}

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


function switchOn( catg, imageid )
{
	//alert( "category " + catg) ;
	if (catg == cat_id ) {
		return	;
	}
	imageid.src =on_images[catg]; 
}

function switchOff( catg, imageid )
{
	//alert( "category " + catg) ;
	if (catg == cat_id ) {
		return	;
	}
	imageid.src =off_images[catg]; 
}