/**
* Change the currently selected tab
* @param {DomNode} anchor The tab link the user clicked
* @returns {Boolean} Always FALSE
*/
function changeTab(anchor){
	
	var tabbox = anchor;
	var target;
	
	// Get tabbox container
	while(tabbox != null && (tabbox.className == null || tabbox.className.indexOf("tabbox") == -1)){
		tabbox = tabbox.parentNode;
		
		// Is H1 - Hx tag
		if(tabbox.nodeName.search(/^h[0-9]$/i) == 0){
			target = tabbox.parentNode;
		}
	}
	if(tabbox == null || target == null){
		return false;
	}
				
	
	// Find and unselect Current Tab
	var tag;
	for(var i = 0; i < tabbox.childNodes.length; i++){
		tag = tabbox.childNodes[i];
		
		// Selected Div
		if(tag.nodeName.toLowerCase() == "div" && tag.className != null && tag.className.indexOf("selected") > -1){
			tag.className = tag.className.replace("selected", "");
			break;
		}
	}
	
	// Select Tag
	if(target != null){
		target.className = (target.className || "") +" selected";
	}
	
	return false;
}