splitAt

gistfile1.js

function splitAt(string, index1, index2, etc) {
    var parts = Array.prototype.slice.call(arguments);
    parts[0] = 0;
    for (var i = 0, l = parts.length; i < l; i++) {
        parts[i] = string.substring(parts[i], parts[i + 1]);
    }
    return parts;
}