setting parent window textfield from child window

Hi,
I am having a parent window with many views including textfield. My requirement is to set the value of a parent window field from child window.How can i achieve this, please suggest some solution ASAP.

Do you mean parent Native window, or parent Webix window ?

In case of native window you can use parent.$$(id) to get any webix control in the parent window. Same as it need to be done with common javascript.