I am using following method to post message

 postMessage(minutes + ":" + seconds);

but  i am getting param issue, that i tried 

 postMessage(minutes + ":" + seconds, "*");

getting message but it comes on widow.message event

how can i get worker thread object?

 creating worker as

w  = Worker(test.js)    test.js file sends postmessage

//this wont work

w.onmessage ==

window.onmessage is expecting , but i must stop worker as w.stop how to do

thanks