easy html help please
 

2 questions

First
I have a side bar on my website that shows some ads. Is there a way I can turn off this sidebar on a certain page such as my home page? Is there an html code I can wrap the column and ads around such as an if statement that says "if not on the home page, then skip column and ads" or something like that?

Second
I have google adsense implemented into my forums and admincp. Is there a way to not show the ads on a certain page such as my home page? With the adsense implemented on high, ads just show up in the same places on every page.

Thanks!