Site is all scrambled, need help ASP please

In and attempt to get my google+ share to work, I added this code to the _header.html. After the site is all scrambled, like there is no temple or any framework at all. I took the code out and fleshed all my cache including the cache on the laptop, but nothing helped. I know it has to be something simple because I did not change anything except the header file. Is googles API changing something on my system or adding a file I can't see? Thanks for any help you can give. 

<script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script>

Did you backup the page first? If so put it back. If no custom changes simple get the same page from a new download... 

Verify cache has been completely cleared by doing it manually from ftp or cpanals file manager.

Turn off all of dolphins caching while working on the site.

If that fails, than restore the original _header.html from the dolphin zip file.

Also let us know what your using for a editor. Some editors cannot deal with the unique tags that exist in template files and thus end up trashing the file.

I turned all the cache off, deleted the 3 cache areas I know of through cpanel and restored the header files not only in my template but also in dolphins default templates, base and tmpl_uni. I had gone through these steps before without a change, but the one thing I did different was I replacing the base and uni template. I guest it change there so how. Everything is up and running now, thanks for your help guys. Now back to working on the google+ button ;) 

I was using the cpanel editor. 

cpanel editor at times remove some parts of the code .. it happens,.. why dont u download a fresh copy and use _header.html from that

I did metromates, everything is up and running. thanks though.  :)