<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>navigator</title><script type="text/javascript"> function validB(){ var u_agent = navigator.userAgent; var B_name="不是想用的主流浏览器!"; 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)"; } document.write("浏览器:"+B_name+"<br>"); document.write("u_agent:"+u_agent+"<br>"); } </script></head><body> <form> <input type="button" value="查看浏览器" > </form></body></html>
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