String formatter with {0}/{1} for js

gistfile1.js

/** String formatter allows to do like this
/* "{0} is dead, but {1} is alive! {0} {2}".format("ASP", "ASP.NET")
**/
if (!String.prototype.format) {
    String.prototype.format = function() {
        var args = arguments;
        return this.replace(/{(\d+)}/g, function(match, number) {
            return typeof args[number] != 'undefined' ? args[number] : match;
        });
    };
 }