def iframe_url(target, width=<NUM_LIT>, height=<NUM_LIT>, scrolling=True, border=<NUM_LIT:0>, frameborder=<NUM_LIT:0>):
prefix = u"<STR_LIT>" if not target.startswith("<STR_LIT:http>") else u"<STR_LIT>"<EOL>target = prefix + target<EOL>if scrolling:<EOL><INDENT>scroll_val = '<STR_LIT:yes>'<EOL><DEDENT>else:<EOL><INDENT>scroll_val = '<STR_LIT>'<EOL><DEDENT>return u'<STR_LIT>'.format(frameborder=frameborder, scrolling=scroll_val, border=border, url=target, width=width, height=height)<EOL>
Produce an iframe for displaying an item in HTML window.
    :param target: the target url.
    :type target: string
    :param width: the width of the iframe (default 500).
    :type width: int
    :param height: the height of the iframe (default 400).
    :type height: int
    :param scrolling: whether or not to allow scrolling (default True).
    :type scrolling: bool
    :param border: width of the border.
    :type border: int
    :param frameborder: width of the frameborder.
    :type frameborder: int