sprintf.js

*
 * This function does not attempt to implement all of sprintf, just %s,
 * which is the only one that I ever use.
 */
function sprintf(text){
    var i = 1, 
        args = arguments;
    
    return text.replace(/%s/g, function(pattern) {
        return (i < args.length) ? args[i++] : "";
    });
}