xml

<?xml version="1.0"?>
<Root>
    <Workstation name="HI1-FRANK-YE">
       <Process name="pcs1">
          <Function>fun1</Function>
          <Function>fun2</Function>
        </Process>
        <Process name="pcs2">
           <Function>fun1</Function>
           <Function>fun2</Function>
        </Process>
     </Workstation>
</ROOT>
如何利用DOM对象取元素,例如如何取得pcs2下的fun1
具体用DOM的什么方法!多谢