This script will replace all English numbers by Hindi numbers, it uses regular expression that exclude numbers between tags, ex: <h3>

English To Hindi

<script type="text/javascript">
        var replaceDigits = function() {
            var map = ["&#x660;","&#x661;","&#x662;","&#x663;","&#x664;", "&#x665;","&#x666;","&#x667;","&#x668;","&#x669;"]
            // replace english floating point with arabic one:
            document.body.innerHTML = document.body.innerHTML.replace(/\d(?=[^<>]*(<|$))/g, function($0) { return map[$0]});
            // replace english floating point with arabic one:
            document.body.innerHTML = document.body.innerHTML.replace(/\.(?=[^<>]*(<|$))/g, "&#x066B;");
        }
        window.onload = replaceDigits;
</script>

Thanks Alot ,, good code