function preventDefault(ev)
{
	ev.returnValue = false;
	if (ev.preventDefault) {
		ev.preventDefault();
	}
	return false;
}

function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	}
	else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

function insertAfter(node, referenceNode) {
	referenceNode.parent.insertBefore(node, referenceNode.nextSibling);
}

function prependChild(child, parent) {
	parent.insertBefore(child, parent.firstChild);
}

/*function deleteNode(id) {
	document.getElementById(id).parentNode.removeChild(document.getElementById(id));
}*/

function deleteNode(node) {
	node.parentNode.removeChild(node);
}