1. use external style sheets
2. move the java scripts to external files
3. use bold and italics where your keywords are visible on the page
4. use H1, H2 etc.
5. improve title and other meta tags.
6. your website is designed using image ready, which is not the perfect way to going about it., use dream weaver / css.
if you still can't succeed then consult with a professional
seo agency.