public static String getAttributeValue(Element el, String attrName)
    {
        return getAttributeValue(el, new QName(attrName));
    }
public static String getAttributeValue ( Element el , String attrName ) { return getAttributeValue ( el , new QName ( attrName ) ) ; }
Get the value from the given attribute
@param el
@param attrName

@return null if the attribute value is empty or the attribute is not present