window.open 返回值问提!

Question

self.opener.frm_b.txt_name.value=frm_a.txt_name.value
其中frm_b是先前的表单
frm_a是当前表单

Answer 1

访问当前open出来的窗口的父窗口：window.opener

Answer 2

<script language="javascript">
<!--
function openNew()
{
var newWin = window.open('','newWin','width=600,height=400');
newWin.document.write('<select onchange="window.opener.test.value=this.options[this.selectedIndex].text"><option value="0" selected>a1</option><option value="1">a2</option></select>');
}
-->
</script>
<input type="text" value="" id="test" />
<input type="button" value="OpenWin" onclick="openNew()" />

Answer 3

Demo  <script type="text/javascript">
  //<![CDATA[
var wnd = window.open('\
about:<select id="Sel">\
<option value="">select option</option>\
<option value="never-online">never-online</option>\
</select>\
',"","");
var a = wnd.document.getElementById("Sel");
a.onchange = function() {
document.getElementById("Ipt").value=a.options[a.selectedIndex].value;
}
  //]]>
  </script>
<input id="Ipt"/>