修改dns monitor前端错误

@@ -57,7 +57,6 @@ function buildIpsTablesHTML(ips) {
                 if(ipList[i].status == "SUCCESSED") {
                     html += "<button class='btn btn-success btn-rounded'>" + ipList[i].ip + "</button>";
                 } else {
-                    html += "<button class='btn btn-danger btn-rounded'>";
                     html += "<a data-container='body' data-toggle='popover' data-placement='bottom' title='Detail'";
                     html += "data-content= '" + ipList[i].info + "'><button class='btn btn-danger btn-rounded'>" + ipList[i].ip + "</button></a>";
                 }