var isloaded = false;
if (document.images) {
    isimg1off = new Image();isimg1off.src = "../images/subnav_cr_class_th_off.gif";
    isimg2off = new Image();isimg2off.src = "../images/subnav_cr_ghilen_th_off.gif";
    isimg3off = new Image();isimg3off.src = "../images/subnav_cr_deer_th_off.gif";
	isimg4off = new Image();isimg4off.src = "../images/subnav_cr_lion_th_off.gif";
	isimg5off = new Image();isimg5off.src = "../images/subnav_cr_horse_th_off.gif";
	isimg6off = new Image();isimg6off.src = "../images/subnav_cr_rhino_th_off.gif";
	isimg7off = new Image();isimg7off.src = "../images/subnav_cr_elephant_th_off.gif";
	isimg8off = new Image();isimg8off.src = "../images/subnav_cr_cattle_th_off.gif";
	isimg9off = new Image();isimg9off.src = "../images/subnav_cr_monkey_th_off.gif";
	isimg10off = new Image();isimg10off.src = "../images/subnav_cr_canine_th_off.gif";	
	isimg11off = new Image();isimg11off.src = "../images/subnav_cr_bird_th_off.gif";	
	isimg12off = new Image();isimg12off.src = "../images/subnav_cr_fish_th_off.gif";
	isimg13off = new Image();isimg13off.src = "../images/subnav_cr_croc_th_off.gif";
	isimg14off = new Image();isimg14off.src = "../images/subnav_cr_crab_th_off.gif";
	isimg15off = new Image();isimg15off.src = "../images/subnav_cr_naga_th_off.gif";
	isimg16off = new Image();isimg16off.src = "../images/subnav_cr_human_th_off.gif";
}
function isimageLoad() {
    if (document.images) {
    isimg1on = new Image();isimg1on.src = "../images/subnav_cr_class_th_on.gif";
    isimg2on = new Image();isimg2on.src = "../images/subnav_cr_ghilen_th_on.gif";
    isimg3on = new Image();isimg3on.src = "../images/subnav_cr_deer_th_on.gif";
	isimg4on = new Image();isimg4on.src = "../images/subnav_cr_lion_th_on.gif";
	isimg5on = new Image();isimg5on.src = "../images/subnav_cr_horse_th_on.gif";
	isimg6on = new Image();isimg6on.src = "../images/subnav_cr_rhino_th_on.gif";
	isimg7on = new Image();isimg7on.src = "../images/subnav_cr_elephant_th_on.gif";
	isimg8on = new Image();isimg8on.src = "../images/subnav_cr_cattle_th_on.gif";
	isimg9on = new Image();isimg9on.src = "../images/subnav_cr_monkey_th_on.gif";
	isimg10on = new Image();isimg10on.src = "../images/subnav_cr_canine_th_on.gif";	
	isimg11on = new Image();isimg11on.src = "../images/subnav_cr_bird_th_on.gif";	
	isimg12on = new Image();isimg12on.src = "../images/subnav_cr_fish_th_on.gif";
	isimg13on = new Image();isimg13on.src = "../images/subnav_cr_croc_th_on.gif";
	isimg14on = new Image();isimg14on.src = "../images/subnav_cr_crab_th_on.gif";
	isimg15on = new Image();isimg15on.src = "../images/subnav_cr_naga_th_on.gif";
	isimg16on = new Image();isimg16on.src = "../images/subnav_cr_human_th_on.gif";
        return (isloaded = true);
    }
}