function getXmlNodeText(oXmlNode) {
		return oXmlNode.textContent || oXmlNode.text;
	}
Returns the value of the <code>textContent</code> or <code>text</code> property of the given XML node.

@param {object} oXmlNode The XML node
@returns {string} The <code>textContent</code> or <code>text</code> property of the given XML node