Javascript Unique UUID like JAVA UUID Pattern. with Time stamp -GUID

Here is the JavaScript version of the UUID Generator.
it will give the Unique UUIDs

same like the java pattern.

function nextUUID() {
    function _pattern(t, s) {
        var p = ((t ? (Date.now()) : (Math.random())).toString(16) + "0000000").substr(2, 8);
        return s ? "-" + p.substr(0, 4) + "-" + p.substr(4, 4) : p;
    }
    return _pattern(true) + _pattern(false, true) + _pattern(false, true) + _pattern();
}

Please Comment below if you need any further clarifications.