prompt() with Internet Explorer 8

Question

I am having a hard time figuring out a solution for my problem. Here's a code snippet:

var ans = prompt("Mot de passe", '');
if (ans != '' && ans != null)
   __doPostBack('__Page', ans);
else
   window.location = "../Erreurs/NotAuthorized.aspx";

This code works really great with Internet Explorer 9. But my client is exclusively working with Internet Explorer 8 so I tested it with ieTester in IE8. But the problem is that the prompt doesn't show and it automatically redirect because the input had an empty string ('').

So how do I fix this to work with Internet Explorer 8?

Does it matter if you add something to the second parameter? — Jamund Ferguson, Apr 17 '12 at 18:55
If I add (for example) 'test' in the second parameter, the prompt doesn't show up neither. Is is a known bug with ieTester or it just doesn't work with a real IE8? — Soader03, Apr 17 '12 at 18:58

score 8 · Answer 1 · edited Jun 20 '20 at 09:12

8

IE has an setting in Internet Options to allow or deny prompt().

_{(source: adamhaskell.net)}

By default in IE8, this setting is off. Consequently, calls to prompt() are ignored and "" is returned by them.

You shouldn't use prompt() anyway. Use a form.

edited Jun 20 '20 at 09:12

Community

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answered Apr 17 '12 at 19:07

Niet the Dark Absol

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score 3 · Accepted Answer · answered Apr 17 '12 at 19:01

It looks like a security thing specific to IE- 8 for sure, I don't have other versions to test. Calling prompt() produces a warning about a scripted window asking for information. I can click to allow and after refreshing the page, the prompt box appears as expected.

If you are going to insist on using prompt(), you will probably have to stipulate that security settings on the target machines are configured to allow it.

score 2 · Answer 3 · answered Jul 30 '13 at 10:35

Microsoft developer website tells us that "prompt()" is deprecated and now normally blocked for security reasons: "By default, this method is blocked by the information bar in the Internet zone. This helps prevent malicious sites from initiating spoofing attacks. "

See http://msdn.microsoft.com/en-us/library/ms536673.aspx

Jamund Ferguson · Answer 4 · 2012-04-17T18:57:24.383

1

From this report it looks like it's a known bug in IETester?

http://www.my-debugbar.com/forum/t294-Javascript-Alerts.html

edited Apr 17 '12 at 18:57

answered Apr 17 '12 at 18:50

Jamund Ferguson

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I think the problem is the prompt isn't even showing, not the following if statement. – Elliot Bonneville Apr 17 '12 at 18:52
Yes, just saw the thread... But I can't get it working with IE7 or 6 neither. – Soader03 Apr 17 '12 at 18:59

prompt() with Internet Explorer 8

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