JavaScript and HTML to judge browser types

JavaScript judgment     navigator.userAgent.indexOf ("IPhone")
    HTML to determine IE type
    1. <!--[if! ie]><!--> can recognize <!--<! except IE [Endif]-->
    2. <!--[if ie]> all IE identifiable <![ Endif]-->
    3. <!--[if IE 5.0]> only IE5.0 can recognize <![ Endif]-->
    4. <!--[if IE 5]> only IE5.0 and IE5.5 can be identified <![ Endif]-->
    5 <!--[if GT IE 5.0]> IE5.0 and IE5.0 versions can be identified <![ Endif]-->
    6. <!--[if IE 6]> only IE6 identifiable <![ Endif]-->
    7 <!--[if Lt IE 6]> IE6 and IE6 The following versions can be identified <![ Endif]-->
    8. <!--[if GTE IE 6]> IE6 and IE6 above can be identified <![ Endif]-->
    9. <!--[if IE 7]> only IE7 identifiable <![ Endif]-->
    <!--[if Lt IE 7]> IE7 and IE7 The following versions can be identified <![ Endif]-->
    <!--[if GTE IE 7]> IE7 and IE7 above can be identified<! [Endif]-->