function doSection(id){
	
	var Current = document.getElementById(id);
	
	var Previous = document.getElementById(id - 1);
	
	if ( Current.style.display == 'none' ) {
		if (document.all) {
			Current.style.display = 'inline';
			Previous.style.display = 'none';
		} else {
			Current.style.display = '';
			Previous.style.display = 'none';
			
		}
	} else {Current.style.display = 'yes';}
}