if(document.images) {
        on_home=new Image;
        on_home.src='colors/red/button_home_on.gif';
        of_home=new Image;
        of_home.src='colors/red/button_home_off.gif';
        on_adds=new Image;
        on_adds.src='colors/red/button_adds_on.gif';
        of_adds=new Image;
        of_adds.src='colors/red/button_adds_off.gif';
        on_info=new Image;
        on_info.src='colors/red/button_info_on.gif';
        of_info=new Image;
        of_info.src='colors/red/button_info_off.gif';
        on_catalog=new Image;
        on_catalog.src='colors/red/button_catalog_on.gif';
        of_catalog=new Image;
        of_catalog.src='colors/red/button_catalog_off.gif';
        on_cart=new Image;
        on_cart.src='colors/red/button_cart_on.gif';
        of_cart=new Image;
        of_cart.src='colors/red/button_cart_off.gif';
} else {
        on_home='';
        document.on_home='';
        of_home='';
        document.of_home='';
        on_adds='';
        document.on_adds='';
        of_adds='';
        document.of_adds='';
        on_info='';
        document.on_info='';
        of_info='';
        document.of_info='';
        on_catalog='';
        document.on_catalog='';
        of_catalog='';
        document.of_catalog='';
        on_cart='';
        document.on_cart='';
        of_cart='';
        document.of_cart='';
}