ns4 = (document.layers) ? true:false 

ie4 = (document.all) ? true:false 

ng5 = (document.getElementById) ? true:false





function hide(n) { 

	if (ng5) {

		document.getElementById('layer0').style.visibility = "visible"; 

		document.getElementById('layer' + n).style.visibility = "hidden" 

	}

	else if (ns4) {

		document.layers["layer0"].visibility = "show"; 

		document.layers["layer" + n].visibility = "hide"; 

	}

	else if (ie4) {

		document.layers["layer0"].visibility = "visible"; 

		document.all["layer" + n].style.visibility = "hidden"; 

	}

}



function show(n) { 

	if (ng5) {

		document.getElementById('layer0').style.visibility = "hidden"; 

		document.getElementById('layer' + n).style.visibility = "visible"; 

	}

	else if (ns4) {

		document.layers["layer0"].visibility = "hide"; 

		document.layers["layer" + n].visibility = "show"; 

	}

	else if (ie4) {

		document.all["layer0"].style.visibility = "hidden"; 

		document.all["layer" + n].style.visibility = "visible"; 

	}

}