location 對象 navigator的應該 （獲取瀏覽器名稱和版本信息）

 

 

 

<script>  console.log("appName"+navigator.appName);  console.log("appVersion"+navigator.appVersion);  console.log("platform"+navigator.platform);  console.log("userAgent"+navigator.userAgent) ;          function validB(){              var u_agent = navigator.userAgent      ;              var B_name="不是想用的主流瀏覽器!";              if(u_agent.indexOf("Firefox")>-1){                  B_name="Firefox";              }else if(u_agent.indexOf("Chrome")>-1){                  B_name="Chrome";              }else if(u_agent.indexOf("MSIE")>-1&&u_agent.indexOf("Trident")>-1){                  B_name="IE(8-10)";              }              else if(u_agent.indexOf("Trident")>-1){                  B_name="IE(11)";              }          var a= u_agent.substring( u_agent.indexOf(B_name),u_agent.length);              document.write("瀏覽器:"+B_name+"<br>");              document.write("u_agent:"+a+"<br>");          }</script><form>    <input type="button" value="查看瀏覽器"   onclick="validB()"></form>