function toggle (that) {
	var state = that.src.split('_')
	state = state[1].split('.')
	switch (state[0]) {
		case 'On':  var newState = 'Off'; break;
		case 'Off': var newState = 'On' ; break;
	}
	that.src = 'Media/Content/Nav/' + that.name + '_' + newState + '.jpg'
}