//// thread definition，http://www.sharejs.com
function Thread( name ) {

    for ( var i = 0; i < 5; i++ ) {

        Print(name+': '+i);
        yield;
    }
}

//// thread management
var threads = [];

// thread creation
threads.push( new Thread('foo') );
threads.push( new Thread('bar') );

// scheduler
while (threads.length) {

    var thread = threads.shift();
    try {
        thread.next();
        threads.push(thread);
    } catch(ex if ex instanceof StopIteration) {}
}


//javascript/8767