PRB: document.readyState Not in Sync with Download in IFrame (188763)


The information in this article applies to:

  • Microsoft Internet Explorer (Programming) 4.0
  • Microsoft Internet Explorer (Programming) 4.01
  • Microsoft Internet Explorer (Programming) 4.01 SP1
  • Microsoft Internet Explorer (Programming) 5
This article was previously published under Q188763

SYMPTOMS

When you insert an IFrame using insertAdjacentHTML, the readyState is not in sync with the download of the document in the new IFrame. If you check the value of document.readyState immediately after the insertAdjacentHTML, the readyState is set to complete, even though the document in the IFrame has not finished loading.

STATUS

The behavior is by design. Once a document goes readystate complete, Internet Explorer does not fire onreadystatechange again.

MORE INFORMATION

Steps to Reproduce Behavior

Here is HTML code that reproduces the problem. When you press the button, an IFrame is inserted before the end of the body. Then, a message box is displayed to show the value of document.readyState. At this point, document.readyState is set to complete. The readyState should change as the document in the IFrame is downloaded. 
<HTML>
<HEAD>
   <TITLE>IFrame/readyState Bug</TITLE>

   <SCRIPT LANGUAGE="VBScript">
   Sub btn_onClick
      document.body.insertAdjacentHTML "BeforeEnd", _
         "<IFRAME SRC='http://www.microsoft.com'></IFRAME>"

      MsgBox "ReadyState: " + document.readyState
   End Sub
  </SCRIPT>
</HEAD>
<BODY>
   <BUTTON ID="btn">Insert IFrame</BUTTON>
</BODY>
</HTML>

REFERENCES

For more information about developing Web-based solutions for Microsoft Internet Explorer, visit the following Microsoft Web sites:

http://msdn.microsoft.com/ie/

http://support.microsoft.com/iep

Modification Type:MajorLast Reviewed:5/11/2006
Keywords:kbpending kbprb KB188763
©2004 Microsoft Corporation. All rights reserved.