function show(id){
        if (ns4){
        	document.layers[id].visibility = "show";
        }
        else if (ie4){
        	document.all[id].style.visibility = "visible";
        }
        else if (ie5 || ns6 || ie6){
        	document.getElementById(id).style.visibility = "visible";
        }
}
function hide(id){
        if (ns4){
			document.layers[id].visibility = "hide";
        }
        else if (ie4){
        	document.all[id].style.visibility = "hidden";
        }
        else if (ie5 || ns6 || ie6){
        	document.getElementById(id).style.visibility = "hidden";
        }
}