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javascriptinternet-explorer-6onbeforeunload

Why is my onbeforeunload handler causing an "Unspecified error" error?

I am using the following JavaScript function within IE6:

window.onbeforeunload = function() {  
  if (itemChanged) {  
     return 'You have made changes to data on this page.  If you navigate away from this page without first saving your data, the changes will be lost.';  
  }  
};

But when I press the Cancel button on the dialog, I am getting a JavaScript page error:

Error: Unspecified error.

Any ideas?

Solution

  • Check your value of (itemChanged). Is it possible something else causes the error? It works fine for me.

    Jsbin sample.