Is it possible to set time zone in xulrunner with JS

My app is based on XULRUNNER. I found when I fetch the current timestamp with Date.prototype.getTime, It seems give me the GMT time not the time of my time zone. But in firefox, there is no such a problem. I am confused that is there a way to set the time zone in xulrunner with JS. _

how to put a button into the title bar in xulrunner?

Hi, all: I am using xulrunner 16 to develop my project. I want to put a button into the title bar of the window. I have set the drawintitlebar attribute of the window to be true, and my xul code is there: ... I want to let the button appear in the title bar of the main window, but