window.open() returns undefined or null on 2nd call

Question

I have the follow scenario:

I click a link which: opens a popup window called 'popup' which loads a pdf inside of it (in IE6).

without closing the popup, i click the link again, which should reopen the pdf inside the popup, but instead a javascript error in thrown: member not found

the javascript function used to open the popup is:

function openWindow(url, name, props) {
  var windowRef = window.open(url, name, props);
  if (!windowRef.opener) {
    windowRef.opener = self;
  }
  windowRef.focus(); //error at this line, windowRef must be null
  return windowRef;
}

question: how do i get around this, without opening a new popup window every time?

Is there a popup blocker stopping it from opening the window? Put alert(windowRef); after window.open, to see if the object is undefined. — shahkalpesh, Jun 06 '09 at 20:50

score 7 · Accepted Answer · answered Jun 11 '09 at 18:42

this is the hack that works that everyone on the internets is using:

function openWindow(url, name, props) {
  if(/*@cc_on!@*/false){ //do this only in IE
    var windowRef = window.open("", name, props);
    windowRef.close();
  }
  var windowRef = window.open(url, name, props);
  if (!windowRef.opener) {
    windowRef.opener = self;
  }
  windowRef.focus();
  return windowRef;
}

Sergei Kovalenko · Answer 2 · 2009-06-08T17:51:31.733

4

try to use global var windowRef outside the function openWindow(). Something like this:

var WindowRef = null;

function openWindow(url, name, props) {
  if(WindowRef == null){
    WindowRef = window.open(url, name, props)
  }
  else{
    WindowRef.document.location = url
  }
  if (!WindowRef.opener) {
    WindowRef.opener = self;
  }
  WindowRef.focus();
  return WindowRef;
}

edited Jun 08 '09 at 17:51

answered Jun 06 '09 at 19:15

Sergei Kovalenko

1,402
12
17

this didnt work, WindowRef.document.location = url part was giving me an access denied error. – mkoryak Jun 11 '09 at 18:41
is the url of in the same domain? – Sergei Kovalenko Jun 12 '09 at 14:57

window.open() returns undefined or null on 2nd call

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