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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Javascript Replacing Existing Elements in DOM</title> </head> <body> <script> function getBrowserInformation() { var info = "\n App Name: " + navigator.appName; info += "\n App Version: " + navigator.appVersion; info += "\n App Code Name: " + navigator.appCodeName; info += "\n User Agent: " + navigator.userAgent; info += "\n Platform: " + navigator.platform; alert("Here're the information related to your browser: " + info); } </script> <button type="button" onclick="getBrowserInformation();">Get Browser Information</button> </body> </html>