Patent ID: 7730419

Claim:
A system for communication between browser windows, the system comprising: at least one computer, including: a first web page configured to enable a first browser window into which the first web page is loaded to write a first message into a cookie; a second web page configured to enable a second browser window into which the second web page is loaded to retrieve the first message from the cookie; wherein the second web page is configured to enable the second browser window into which the second web page is loaded to write a second message into the cookie; and wherein the first web page is configured to enable the first browser window into which the first web page is loaded to retrieve the second message from the cookie; and a system for preventing a collision when the first browser window and the second browser window attempt to write to the cookie at the same time, the preventing comprising: the first browser window reading the cookie to determine if the first message has been written to the cookie, and if not, waiting a period of time before again attempting to write the first message to the cookie; and the second browser window reading the cookie to determine if the second message has been written to the cookie, and if not, waiting a period of time before again attempting to write the second message to the cookie.