appCodeName        # "Mozilla"
appName            # "Netscape"
appVersion         # "5.0"
cookieEnabled      # "ture"
userAgent          # 头信息

back()
forward()
go(-1)
go(1)
go(0)

host
port
href
pathname
protocol
search
assign(URL)
reload()       # 刷新

height
width
availHeight
availWidth

var t = setTimeout (FUNC, 1000);
var t = setInterval(FUNC, 1000);
clearTimeout(t);
clearInterval(t);