var naviClass = "thide";
		
function collapseAll() {
	
	var allSections = document.getElementsByTagName("UL");
		
	for (i = 0; i < allSections.length; i++) {
				
		if (allSections[i].className == naviClass) { allSections[i].style.display = "none"; }
				
	}
			
}
		
function expand(name) {
		
	collapseAll();
	var newStyle = "";
			
	if (document.getElementById(name).style.display != "block") { newStyle = "block"; } 			
	else { newStyle = "none"; }
			
	document.getElementById(name).style.display = newStyle;

}