function focusNextElement(node){
	while(node = node.nextSibling){
		if(node.nodeType == 1){	node.focus(); return }
	}
}
function focusPreviousElement(node){
	while(node = node.previousSibling){
		if(node.nodeType == 1){	node.focus(); return }
	}
}
function addClass(classname){
	return function(evt){
		dojo.addClass(evt.target, classname);
	}
}
function removeClass(classname){
	return function(evt){
		dojo.removeClass(evt.target, classname);
	};
}