window.open方法出现stack overflow

<html>
<head><SCRIPT language="JavaScript">  function open1(){  ///////////////////改掉名字吧
    window.open("jsp2.jsp","","WIDTH=300,HEIGHT=200")
  }</SCRIPT></head>
<body><form action="aa">
  <input type="text" name="t1">
  <br>
  <input type="text" name="t2">
  <input type="button" value="Open" onclick="open()">
  <a href="javascript:window.open('a.html','','WIDTH=300,HEIGHT=200')">openWindow</a>
</form></body>