function showclip(){
        if(navigator.appName != "Netscape"){
                if(document.all['show'].style.visibility == "visible")
                        document.all['show'].style.visibility = "hidden";
                else 
                        document.all['show'].style.visibility = "visible";
        }
        if(navigator.appName == "Netscape"){
                if(document.layers['show'].visibility == "showclip")
                        document.layers['show'].visibility = "hide";
                else
                        document.layers['show'].visibility = "showclip";
        }
}