this looks like you probably edited the template using the HTML mode (which is strongly not recommended), and the editor messed up the code.. you would need to go back to the original template code. you can reinstall the invoice manager if you want to recover it.

Thanks for the reply. I didnt edit the template, it was like that after I installed it... Where can i get the originial template without re-installing the extension..

Thank you for reply. So if we are not suppose to edit the temlpates then how can i personelise it like adding logo etc. Also if i re instal it without uninstalling, will i loose the invoices I created?

Thanks

i didn't say that you're not supposed to edit templates..! I only said that you should not use the HTML editing mode because sometimes the joomla editors mess things up. there's another editing method, which is the plain text edition (look at the templates page.. you will see two options, and they are clearly marked as recommended and Not recommended).
what I was saying is that you should use the Recommended mode, not the "not recommended"...

you won't loose any invoices created if you reinstall. don't worry about that.

Hello,

Thank you for replying and I am sorry if I sounded mean with my reply. I will re install the onvoice and also would that help if i copy the codes from plain text edition and paste it in dreamviewer and edit it in there and then copy from dreamviewer and copy them back to plain text editor?

I did re-install the invoice but it didnt solve the problem. I then installed the invoice to my other joomla site and copied the codes from there and paste it in main website and now the problem is solved.