Abstract: A method for preventing spam comments from populating a web site is provided. The method includes intercepting a HTTP (Hypertext Transfer Protocol) response, which includes a web page with a form for enabling a client's general comments to be published on the web site. The method also includes modifying the web page with the form to create a modified web page with a randomized form. The modifying includes randomly adding a set of randomized variable names to the web page with the form. The set of randomized variable names is a set of randomly generated character strings. The method further includes forwarding the modified web page with the randomized form to the client. The method yet also includes adding the set of randomized variable name to a form database, which is configured for storing data about the modified web page with the randomized form.

Abstract: An antenna structure comprises a substrate, a first conductive element, a feed point, a first extending element, two first radiation elements, two second radiation elements, a ground element, a signal line, and a ground line. The first conductive element is disposed on the substrate and extends in a first direction. The feed point is connected to an end of the first conductive element. The first extending element is connected to another end of the first conductive element opposite to the feed point and extends in the second direction. The first radiation elements are connected to two ends of the first extending element and extend in the first direction. The second radiation elements are connected to the first extending element, near the first radiation elements and extend in the first direction. The ground element is disposed on the substrate. The signal line is coupled to the feed point. The ground line is coupled to the ground element.

Abstract: An antenna structure comprises a substrate, a reflective element, a first radiation unit, a second radiation unit, a first impedance matching unit, a second impedance matching unit, a feed point, a first conductive line and a second conductive line. The substrate comprises a first surface and a second surface. The reflective element is disposed on the second surface. The first and the second radiation units are disposed on both sides of the reflective element. The first impedance matching unit is disposed on the first surface corresponding to the first radiation unit. The second impedance matching unit is disposed on the first surface corresponding to the second radiation unit. The feed point is coupled between the first impedance matching unit and the second impedance matching unit. The first conductive line is coupled to the feed point. The second conductive line is coupled to the reflective element.