HTTP server push

A sub category of push technology specifically related to the HTTP protocol. The term server push was originally coined by Netscape in 1995.[1] A special MIME type called multipart/x-mixed-replace was added, which Netscape 1.1 and subsequent web browsers would interpret as a document changing whenever the server felt like pushing a new version to the client.[2][3] It is still supported by Mozilla Firefox, Opera and Safari today, but traditionally ignored by Microsoft .[4] It can be applied to HTML documents, but also for streaming images in webcam applications.

The WHATWG is drafting a Web Applications 1.0 specification [5] which pushes content to the client. On September 1st, 2006, the Opera web browser implemented this new experimental technology in a feature called "Server-Sent Events."[6][7]

KokonЗдравствуйте! На странице при клике на ссылку открывается (document.open()) новое окно (не модальное), подскажите пожалуйста как можно в него на форму передать параметр.

Приведите конкретно что и куда нужно передать. Тут очень много вариантов. В частности без window.open() можно обойтись (например при помощи атрибута target=_blank)