What does pattern do?

[Daniel Casserly]

Hi I love the controls. Just wanted to know what the pattern property does and
how to use it and also is there a way that we could show currency symbols on
certain number edits?

Thanks in advance, please email me at admin@buckit.co.uk when you can, thanks
again! Daniel

[Jason Akin]

Hi Daniel, Thanks for the positive feedback. The official
answer is: "The pattern attribute specifies a regular
expression against which the control's value, or, when the multiple attribute
applies and is set, the control's values, are to be checked." My quick and
dirty use of it is just to choose which keyboard pops up on a mobile device. I'm not sure how widely implemented the validation is in
various browsers. Let me know what you find, I'm always open to suggestions.
As I read that, I just realized that I haven't implemented "multiple" yet. I'm
going to post an update shortly that will add the multiple tag and something
new on the Map Links.