ns = (document.layers)? true:false
ie = (document.all)? true:false
ns6 = (document.getElementById)? true:false

if (ns6) divs = document.getElementsByTagName("div")

function show(id)
{	if (ns) document.layers[id].visibility = "show"
	else if (ie) document.all[id].style.visibility = "visible"
	else if (ns6) divs[id].style.visibility = "visible"
}
function hide(id)
{	if (ns) document.layers[id].visibility = "hide"
	else if (ie) document.all[id].style.visibility = "hidden"
	else if (ns6) divs[id].style.visibility = "hidden"
}