window.opener 返回的是创建当前窗口的那个窗口的引用，比如点击了a.htm上的一个链接而打开了b.htm，然后我们打算在b.htm上输入一个值然后赋予a.htm上的一个id为“name”的textbox中，就可以写为：
window.opener.document.getElementById("name").value = "输入的数据";
DEMO
page1.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>无标题文档</title>
<script language="javascript">
function openwin(url,wh,hg,lf,tp) {
var newwin=window.open(url,"newwin","toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=yes,resizable=yes,width="+wh+",height="+hg+",left="+lf+",top="+tp); newwin.focus(); return false;
}function openwin1(url) { var newwin=window.open(url,"newwin","toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=yes,resizable=yes"); newwin.focus(); return false;}
</script></head><body><input name="name" type="text" /><input type="button" onClick="openwin1('page2.html')" value="abc" /></body></html>page2.html
