MVC 3 jQuery Validation/globalizing of number/decimal field

You could try the jQuery Globalization plugin from Microsoft:

<script src="https://stackoverflow.com/questions/5199835/@Url.Content("~/Scripts/jquery.validate.js")" type="text/javascript"></script>
<script src="https://stackoverflow.com/questions/5199835/@Url.Content("~/Scripts/jquery.validate.unobtrusive.js")" type="text/javascript"></script>

<script src="https://stackoverflow.com/questions/5199835/@Url.Content("~/Scripts/jquery.glob.js")" type="text/javascript"></script>
<script src="https://stackoverflow.com/questions/5199835/@Url.Content("~/Scripts/globinfo/jquery.glob.da-dk.js")" type="text/javascript"></script>
<script type="text/javascript">
    $.validator.methods.number = function (value, element) {
        return !isNaN($.parseFloat(value));
    }

    $(function () {
        $.preferCulture('da-DK');
    });
</script>

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Plugin was renamed and moved, you should use Globalize (Mar 2012)

<script src="https://stackoverflow.com/questions/5199835/@Url.Content("~/Scripts/jquery.globalize/globalize.js")" type="text/javascript"></script>
<script src="https://stackoverflow.com/questions/5199835/@Url.Content("~/Scripts/jquery.globalize/cultures/globalize.culture.da-DK.js")" type="text/javascript"></script>
<script type="text/javascript">
    $.validator.methods.number = function (value, element) {
        return !isNaN(Globalize.parseFloat(value));
    }

    $(document).ready(function () {
        Globalize.culture('da-DK');
    });
</script>

more about this on Scott Hanselman blog post

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