function viewOpt(thisDiv){

	var divName = "subnav"+thisDiv;

	if (document.layers) {
		d = document.layers[divName];
		dShow = 'show';
		dHide = 'hide';
	}
	else if (document.all) {
		d = document.all(divName).style;
		dShow = 'visible';
		dHide = 'hidden';
	}
	else {
		d = document.getElementById(divName).style;
		dShow = 'visible';
		dHide = 'hidden';
	}
	d.visibility = dShow;
}
function hideOpt(thisDiv){

	var divName = "subnav"+thisDiv;

	if (document.layers) {
		d = document.layers[divName];
		dShow = 'show';
		dHide = 'hide';
	}
	else if (document.all) {
		d = document.all(divName).style;
		dShow = 'visible';
		dHide = 'hidden';
	}
	else {
		d = document.getElementById(divName).style;
		dShow = 'visible';
		dHide = 'hidden';
	}
	d.visibility = dHide;
}
function hideAll(){
	if (document.layers) {
		document.layers['subnav1'].visibility = 'hide';
		document.layers['subnav2'].visibility = 'hide';
		document.layers['subnav3'].visibility = 'hide';
		document.layers['subnav4'].visibility = 'hide';
		document.layers['subnav5'].visibility = 'hide';
		document.layers['subnav6'].visibility = 'hide';
	}
	else if (document.all) {
		document.all('subnav1').style.visibility = 'hidden';
		document.all('subnav2').style.visibility = 'hidden';
		document.all('subnav3').style.visibility = 'hidden';
		document.all('subnav4').style.visibility = 'hidden';
		document.all('subnav5').style.visibility = 'hidden';
		document.all('subnav6').style.visibility = 'hidden';
	}
	else {
		document.getElementById('subnav1').style.visibility = 'hidden';
		document.getElementById('subnav2').style.visibility = 'hidden';
		document.getElementById('subnav3').style.visibility = 'hidden';
		document.getElementById('subnav4').style.visibility = 'hidden';
		document.getElementById('subnav5').style.visibility = 'hidden';
		document.getElementById('subnav6').style.visibility = 'hidden';
	}
}