<form name="form1" method="post" action="first.php" target="FIRST">
<input type="text" name="name">
<input type="submit" name="Submit" value="查询">
</form><iframe name="FIRST"></iframe>
<input type="text" name="name">
<input type="submit" name="Submit" value="查询">
</form><iframe name="FIRST"></iframe>
<input type="text" name="name">
<input type="submit" name="Submit" value="查询">
</form><iframe name="FIRST" src="xxx.php?name=<?php echo $_POST['name']?>"></iframe>