[wvxvw]

var xml:XMLList = 
XMLList(
<a id="1"/> +
<a id="7">
	<a id="4"/>
	<a id="5"/>
</a> +
<a id="2"/> +
<a id="3"/>);
var array:Array = [];
xml.(array.push(int(@id.toString())))..*.@id.(array.push(int(toString())));
trace(array);
trace(Math.max.apply(Math, array));