两个文件,test.htm 和 lizi.htm
++++===================  test.htm =========
<html>
<head><meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<form name="form1" method="post" action="">
  <p>
    <select name="select" onchange="window.open('lizi.htm')">
      <option>1</option>
      <option>2</option>
    </select>
  </p>
  <p>
    <input type="text" name="textfield">
  </p>
</form>
<script>
var str=document.location.search
if(str) {
var str2=str.split("=")
document.form1.textfield.value=str2[1];
}
</script>  </body>
</html>========== lizi.htm ===========
<html>
<head>
<title>无标题文档</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script>
function test(){
opener.location.href=opener.location+"?form1="+document.form1.textfield.value
opener.location.reload()
self.close()
}
</script>
</head><body bgcolor="#FFFFFF" text="#000000">
<form name="form1" method="post" action="">
  <input type="text" name="textfield">
  <br>
  <input type="submit" name="Submit" value="提交" onclick="test()">
</form>
</body>
</html>