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Mozilla 1.6b < Mozilla 1.0.1?

Warning, you are using Mozilla Version 1.6b. The recommended browsers to view this page are Internet Explorer 4.0 or better, Netscape 4.0 or better, Mozilla 1.0.1 or better, or Opera 5.0 or better.

This USPS page uses the expression (browserName == "Mozilla" && browserVersion >= 1.0) to recognize acceptable versions of Mozilla. The string "1.6b" becomes NaN when coerced to a number, so the expression is false if you're using Mozilla 1.6b. If you're using Mozilla 1.5 instead of 1.6b, you won't see the warning. Ironically, "1.0.1", the minimum version they claim to support, coerces to NaN.

If the site had used parseFloat instead of implicit coercion, it wouldn't have hit this problem. parseFloat("1.6b") returns the number 1.6.

This entry was posted on Monday, December 22nd, 2003 at 5:01 am and is filed under JavaScript, Mozilla. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.

3 Responses to “Mozilla 1.6b < Mozilla 1.0.1?”

  1. Dennis Pallett Says:
    December 22nd, 2003 at 6:51 am

    I got the same message, except for Mozilla 1.5a instead of 1.6b. Funny thing is though, I’m not even using Mozilla 1.5a. I’m using Firebird 0.6.1

  2. alanjstr Says:
    December 22nd, 2003 at 10:05 am

    I love it when they tell me to upgrade. It makes me want to smack them around.

    Hmmm. You might want to turn the Topics sidebar into a dropdown.

  3. Jackrabbit Slim's Says:
    January 8th, 2004 at 12:56 pm

    This site is best viewed with whatever you like.

    Rant of the day: Today I got reminded of one of the most annoying things I have ever found on the web: Websites who question my choice in web browsers. The familiar “You need at least such and such version to be able to see this site” message. If at le…