function showLayer(layerName) {
	if (document.getElementById && document.getElementById(layerName) != null)
		document.getElementById(layerName).style.visibility='visible';
	else if (document.layers && document.layers[layerName] != null)
		document.layers[layerName].visibility = 'visible';
    	else if (document.all)
		document.all[layerName].style.visibility = 'visible';

	for(i=1;i<=9;i++) {
		if (document.getElementById && document.getElementById("m"+i) != null) {
			document.getElementById("m"+i).className="menu";
		}
	}

}



function hideLayer() {
	if (document.getElementById) {
		document.getElementById('sm1').style.visibility='hidden';
		document.getElementById('sm2').style.visibility='hidden';
		document.getElementById('sm3').style.visibility='hidden';
		document.getElementById('sm4').style.visibility='hidden';
		document.getElementById('sm5').style.visibility='hidden';
		document.getElementById('sm6').style.visibility='hidden';
		document.getElementById('sm7').style.visibility='hidden';
		document.getElementById('sm8').style.visibility='hidden';
		document.getElementById('sm9').style.visibility='hidden';
	}
    	else if (document.layers) {
		document.layers['sm1'].visibility = 'hidden';
		document.layers['sm2'].visibility = 'hidden';
		document.layers['sm3'].visibility = 'hidden';
		document.layers['sm4'].visibility = 'hidden';
		document.layers['sm5'].visibility = 'hidden';
		document.layers['sm6'].visibility = 'hidden';
		document.layers['sm7'].visibility = 'hidden';
		document.layers['sm8'].visibility = 'hidden';
		document.layers['sm9'].visibility = 'hidden';
	}
	else if (document.all) {
		document.all['sm1'].style.visibility = 'hidden';
		document.all['sm2'].style.visibility = 'hidden';
		document.all['sm3'].style.visibility = 'hidden';
		document.all['sm4'].style.visibility = 'hidden';
		document.all['sm5'].style.visibility = 'hidden';
		document.all['sm6'].style.visibility = 'hidden';
		document.all['sm7'].style.visibility = 'hidden';
		document.all['sm8'].style.visibility = 'hidden';
		document.all['sm9'].style.visibility = 'hidden';
	}
}