function show(node){
	node.style.display = "block";
}
function hide(node){
	node.style.display = "none";
}
function toggle(node){
	if(node.style.display != 'block')
		show(node)
	else
		hide(node)
}
function cancelBubble (evt) {	
	var e=(evt)?evt:window.event;
	if (window.event) {
		e.cancelBubble=true;
	} else {
		//e.preventDefault();
		e.stopPropagation();
	}
}