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;
}