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


var $xmlHttp;
function createXMLHttpRequest() {
	if (window.ActiveXObject) {
		$xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
	}
	else if (window.XMLHttpRequest) {
		$xmlHttp = new XMLHttpRequest();
	}
}


function insertAfter($new_element, $target_element) {
	var $parent = $target_element.parentNode;
	
	if ($parent.lastChild == $target_element) {
		$parent.appendChild($new_element);
	}
	else {
		$parent.insertBefore($new_element,$target_element.nextSibling);
	}
}


function removeNode($node) {
	var $parent_node = $node.parentNode;
	var $handle = $parent_node.removeChild($node);
	return $handle;
}