获取iframe的值问题

Question

<iframe id="Iframe2" frameborder="0"  onreadystatechange="test(this)"  scrolling="no" src="/UpFile.aspx?frameId=2" style="width: 385px; height: 28px"></iframe>  function test(_frame)
    { 
         if (_frame.readyState=="complete")//state: loading ,interactive,   complete
         {
            alert(_frame.document.getElementById("test"));
             //alert(_frame.document.getElementById("filePath"));
         }   
    }

Answer 1

window.frames[''].document.getElementById("")

Answer 2

        function test(_frame) {
            if (_frame.readyState == "complete")//state: loading ,interactive, complete
            {
                alert(_frame.document.getElementById(_frame.id));
                alert(_frame.src);
            }
        }