def doSearch(self):
    link = self.url.text()
    pat = re.compile('(.+)\\.(.+)')
    patHttp = re.compile('^http://')
    if pat.match(link) and not patHttp.match(link):
        link = 'http://' + link
    elif not pat.match(link):
        link = 'http://www.google.com/search?q=' + link.replace(' ', '+')
    self.web.load(QtCore.QUrl(link))