Javascript--useragent

UserAgent

Returns a string representation of the user-agent header (that is, a string that includes browser version information, etc.)

Grammar

Navigator.useragent

Several browsing user_agent., like 360 compatibility mode with IE, speed mode with the Chrom kernel.

Use useragent to determine what browser to use (assuming you are using the IE8 browser), the code is as follows:

function Validb () {   var u_agent = navigator.useragent;   var b_name= "Failed to identify the browser";   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 ("B_name:" +b_name+ "<br>");   

Operation Result:

Javascript--useragent