'Render event into HTML'

def render(self, css_class='', style=''):

    if (not css_class):
        css_class = self.css_class
    else:
        css_class = ((self.css_class + '    ') + css_class)
    if (not style):
        style = self.style
    return Markup((self.markup % (css_class, self.url, style, self.name)))
