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



document.getElementsByClassName = function($name) {
	var $results = new Array();
	var $elements = document.getElementsByTagName("*");
	for (var $i=0; $i<$elements.length; $i++) {
		var $classes = $elements[$i].className.split(" ");
		for (var $j=0; $j<$classes.length; $j++) {
			if ($classes[$j] == $name) {
				$results[$results.length] = $elements[$i];
			}
		}
	}
	return $results;
};


function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}