Limiting Keywords with jQuery by counting commas?

I'm using a CMS to allow users to add keywords to their profiles, but I'm wanting to limit that to 10 keywords, which are comma-del开发者_开发问答imited, by counting the number of commas (in this case, 9).

Any ideas on how to go about doing this with jQuery? I'll be doing a double-check on the server-side, but I'd like a quick little, live error checker on the front-end.

instead of counting commas, how about splitting them then get the length.

var count = 'reigel,me,you,we'.split(',').length; // results 4

fiddle to see.

and if you're using this in a <form>, you could edit the submit handler like this,

$('#formID').submit(function(){
    if ($('#inputTextId').val().split(',').length < 10) {
        return false; // prevent page from submitting...
    }
})​;​

another fiddle

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