Pretty print numbers with thousand delimiter

intcomma.js

var intcomma = function(value, delimiter) {
    /*
     Original script found here https://gist.github.com/559757
     Added optional argument delimiter to choose witch symbol
     to use for thousand delimiter 
    */
    var origValue = String(value);
    if (typeof(delimiter) == 'undefined') delimiter = ',';
    var newValue = origValue.replace(/^(-?\d+)(\d{3})/, '$1'+delimiter+'$2');
    if (origValue == newValue){
        return newValue;
    } else {
        return intcomma(newValue, delimiter);
    }
};