【XML】遍历xml子节点

var myXML:XML =  
 <order> 
     <item id='1' quantity="5"> 
         <menuName>burger</menuName>  
         <price>3.95</price>   
    </item> 
     <item id='2' quantity="3"> 
         <menuName>fries</menuName>   
        <price>1.45</price>   
    </item> 
 </order>;
 
var newItem:XML =  
 <item id="3" quantity="2"> 
     <menuName>medium cola</menuName> 
    <price>1.25</price> 
 </item>;
 
 myXML.appendChild(newItem);
 
 var total:Number = 0; 
 for each (var property:XML in myXML.item) 
 { 
  var q:int = Number(property.@quantity); 
  var p:Number = Number(property.price); 
  var itemTotal:Number = q * p; 
  total += itemTotal; 
  trace(q + " " + property.menuName + " $" + itemTotal.toFixed(2)) 
 } 
 trace("Total: $", total.toFixed(2));

/*
5 burger $19.75
3 fries $4.35
2 medium cola $2.50
Total: $ 26.60
*/