浏览器检测

<script type="text/javascript">
    $(function() {

        //安全检测

        function loadsafe() {

            var userinfo = navigator.userAgent;

            var returntxt;

            if (userinfo.indexOf("UC") > -1) {

                returntxt = "UC浏览器";

            } else if (userinfo.indexOf("QQ") > -1) {

                returntxt = "QQ浏览器";

            } else if (userinfo.indexOf("Firefox") > -1) {

                returntxt = "火狐浏览器";

            } else if (userinfo.indexOf("baidu") > -1) {

                returntxt = "百度浏览器";

            } else if (userinfo.indexOf("360") > -1) {

                returntxt = "360浏览器";

            } else if (userinfo.indexOf("tiantian") > -1) {

                returntxt = "天天浏览器";

            } else if (userinfo.indexOf("Opera") > -1) {

                returntxt = "欧鹏浏览器";

            } else if (userinfo.indexOf("Maxthon") > -1) {

                returntxt = "遨游浏览器";

            } else if (userinfo.indexOf("iPhone") > -1) {

                returntxt = "苹果浏览器";

            } else {

                returntxt = "系统浏览器";

            }

            $("body").append('<div class="safe_tips"><span class="safe_arrow"></span><p class="safe_txt"><img src="/images/safeico.png" />该网站已通过' + returntxt + '安全认证 </p></div><style>.safe_tips{ width:90%;position:fixed;left:5%;top:40px;z-index:99999999; display:none;overflow:hidden;}.safe_arrow{ width:0; height:0;border-width:10px 7px 10px 7px; border-style:solid;border-color:transparent; border-bottom:10px solid #ED7A23; display:block; margin-left:5px;}.safe_txt{ width:100%; height:25px; background:#ED7A23; line-height:25px; color:#486600; font-size:16px; color:#fff; border-radius:2px;}.safe_txt img{ width:18px; margin:3px 5px 0 5px; vertical-align:top;}</style>');

            var fin = setTimeout(function() {

                $(".safe_tips").fadeIn(500);

            }, 1000);

            var fout = setTimeout(function() {

                $(".safe_tips").fadeOut(500);

            }, 5000);

        }

        loadsafe();

    });
    </script>