How to detect browser using javascript

we can use navigator.userAgent to detect the type/name of current browser and perform compatibility operations according to it:

below is javascript code so put it in script tag

function DetectBrowser()
   {

       var val = navigator.userAgent.toLowerCase();

          

       if(val.indexOf("firefox") > -1)

       {

           isFF = true;

       } 

       else if(val.indexOf("opera") > -1)

       {
           isOP = true;

       }

       else if(val.indexOf("msie") > -1)

       {

           isIE = true;

       } 

       else if(val.indexOf("safari") > -1)

       {

           isIE = true;

      } 
}