var navStates = new Array();

function toggleNav(item) {
	imgObj = document.getElementById(item+'_img');
	if (navStates[item] != undefined) {
		imgObj.src = '/gfx/nav/'+item+'_off.gif';
		navStates[item] = undefined;
	} else {
		imgObj.src = '/gfx/nav/'+item+'_sel.gif';	
		navStates[item] = true;
	}
	return false;
}