private Element getChildElement(Element parent) {
	NodeList list = parent.getChildNodes();
	int len = list.getLength();
	for (int i = 0; i < len; i++) {
	    Node node = list.item(i);
	    if (node instanceof Element) {
		return (Element) node;
	    }
	}
	return null;
    }
private Element getChildElement ( Element parent ) { NodeList list = parent . getChildNodes ( ) ; int len = list . getLength ( ) ; for ( int i = 0 ; i < len ; i ++ ) { Node node = list . item ( i ) ; if ( node instanceof Element ) { return ( Element ) node ; } } return null ; }
return fitst child Element of a Element, if there are no child Elements return null

@param parent parent node
@return child Element