def minify_js(js):
    """
    Basic minification of javascript code.
    Assumes no line comments and semi-colon delimited lines
    """
    return re.sub("[/][*][\s\S]*?[*][/]", "",             # remove /**/ comments
        js.replace("    ", "").replace("\n", "")    # remove 4 spaces and new lines (assume semicolons exist)
    )