I have a regex validating a password value to be > 6 < 25 characters with at least one number.
var passwordRegEx = /^(?=.*\d)(?=.*[a-zA-Z]).{6,25}$/;
if(!#quickRegister_Password').val().test(pass))
{
errorMgs += 'Your password must be at least 6 characters and have at least 1 number and 1 letter.\r\n';
}
It works in Firefox, Chrome, IE8 (IE7 ran from compatability in IE8) but not IE7 standalone.
I think you have run into the regular expression lookahead bug in IE7's javascript engine.
Run the tests on this page and see if your results match up; you will probably see the lookahead tests fail: http://www.javascriptjedi.com/regex/tests/
Information:
来源：https://stackoverflow.com/questions/3999733/ie7-regex-issue-regex-that-work-in-every-browser-does-not-work-in-ie7