Javascript 5

This function is used to detect the browser type and to returns a alert ,If the browser is new else returns a alert saying upgrade the browser..

function detectBrowser()
{
var browser=navigator.appName;
var b_version=navigator.appVersion;
var version=parseFloat(b_version);
if ((browser=="Netscape"||browser=="Microsoft Internet Explorer") && (version>=4))
{
alert("Your browser is good enough!");
}
else
{
alert("It's time to upgrade your browser!");
}
}
Please look here
http://www.rit.edu/~gxs8938/rit737/finalindex.html