Your JavaScript may be disabled on your browser. To play the games you will need to have this enabled on your browser, or upgrade to one that can process JavaScript.
To see if your browser passes the JavaScript test, visit
http://www.infinisoft.34sp.com/misc/jstest.htm
If you pass it then something else may be at fault. If you fail it, then see if you can turn on JavaScript by going to the security settings of your browser and decreasing the security level or going into the Advanced or Custom settings and enabling scripting. If you don't have any of these then you may need to download the latest version of the following browsers: Internet Explorer, Netscape, or Mozilla.