It would appear that JavaScript and/or AJAX is not working properly in your browser. This may be because:
To check the security settings of your browser go to 'Tools' and then 'Options' or 'Internet Options'. There should be a security tab which will allow you to set the security level of your browser. If this is set to the highest level it may disable certain features that enable Webjam and many other interactive websites to work properly.
If you are using an older browser, Webjam recommends upgrading to Firefox: