// JavaScript Document
function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp('(^|\\\\s)'+searchClass+'(\\\\s|$)');
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}

function swapContent(obj){
	var links = document.getElementById('about_us');
	for( var x = 0; x < links.childNodes.length; x++ ) {
		if (links.childNodes[x].nodeName == 'UL') {
			var nodeLinks = links.childNodes[x]
			for ( var y = 0; y < nodeLinks.childNodes.length; y++ ) {
				if (nodeLinks.childNodes[y].nodeName == 'LI') {
					(nodeLinks.childNodes[y].firstChild.id == ('link_' + obj))?nodeLinks.childNodes[y].firstChild.className = 'on' : nodeLinks.childNodes[y].firstChild.className = 'off';
				}
			}
		}
	}
	var currentLink = document.getElementById('link_' + obj);
	currentLink.className = 'on';
	var content = getElementsByClass('content');
	for (var z = 0; z < content.length; z++) {
		(content[z].id == obj)?content[z].style.display = 'block':content[z].style.display = 'none';
	}
}

function adjustTopNav(nav_sec){
	var section;
	section = document.getElementById(nav_sec);
	if (section) section.childNodes[0].className = 'current';
}