将图像从弹出子窗口传递到父窗口

Question

我正在尝试将图像从弹出子窗体传递到父窗体。

父表单脚本

    <script type="text/javascript">
      var popup;
      function SelectSig() {
      popup = window.open("Popup.htm", "Popup", "width=600,height=300");
      popup.focus();
      }
    </script>

父表单按钮

     <input type="button" value="Insert Signature" onclick="SelectSig()" /></td>

子表单脚本

    <script type="text/javascript">
function SetSig() {
    if (window.opener != null && !window.opener.closed) {
        var ClientSig = window.opener.document.getElementById("ClientSig");
        ClientSig.src = document.getElementById("saveSignature").src;
       window.close();
        }


   </script>

子表单按钮

      <input type="button" value="Select" onclick="SetSig();" />