A computer-readable medium including computer-executable code for enhancing an electronic document with one link and being served via a network responsively to a request received via the network and correspondent to an electronic document. The chat application may be for use with a mobile device and be less computing resource intensive. Certain embodiments of the present invention may not require a code or applets to be inserted to provide chat functionality. Advantageously, only a link may need to be inserted, for example. This may provide particularly well suited for use with websites where traditional chat code or applets may not be inserted.