You may have been referred here because you posted a question to the Google Sites help forum by mistake.
This is a help forum for the Google Sites product (a web site creation tool). I suggest you look here:
for a more appropriate help forum.
There is also a help center here
For general questions not answered by those forums try posting to Ask.Com or simply do a Google Search for your question.
And if your question IS about your Google Site, please include the URL to your site and to your mapped domain if you have one. Screen shots illustrating the problem can sometimes be helpful.