I'm not sure the trouble you're having. I haven't tried this myself, but I can't think of any issue with what you're talking about. Assuming you can't simply place the HTML in there, there are two work arounds for putting content in that either SalesForce or, more likely, security controls on browsers prevent from being displayed.
1) Use a custom URL page. I haven't had any issue placing any type of content on pages like that. If you do something based on cookies you need to set privacy settings to get around the security controls but a simple applet shouldn't have an issue.
2) Use javascript to modify a page after its been rendered. <script>document.write('some html code here')</script> is very usefull.
Describe the issue you're having a bit more and I'll offer some more help.
I'm not sure the trouble you're having. I haven't tried this myself, but I can't think of any issue with what you're talking about. Assuming you can't simply place the HTML in there, there are two work arounds for putting content in that either SalesForce or, more likely, security controls on browsers prevent from being displayed.
1) Use a custom URL page. I haven't had any issue placing any type of content on pages like that. If you do something based on cookies you need to set privacy settings to get around the security controls but a simple applet shouldn't have an issue.
2) Use javascript to modify a page after its been rendered. <script>document.write('some html code here')</script> is very usefull.
Describe the issue you're having a bit more and I'll offer some more help.