This piece of javascript code will check which browser (and version) your user is running.<html> 
<head> 
<script language=”javascript”>var browserName = navigator.appName; 
var browserVersion = navigator.appVersion; 
var browserVersionNum = parseFloat(browserVersion);function detectbrowser() 

BrowserInfo = ” (Your browser is ” + browserName + ” ” + browserVersionNum +”)”; 
alert(compatible + BrowserInfo); 

<body> 
<a href=”javascript:detectbrowser()”>Checkbrowser</a> 
</body> 
</html>
 

Page contents: itechies.net – Learn how to do Browser checking using javascript.