Man
Some suggestions.

There are some validation problems because of slidemenu module.

The reasons are

1) the use of
"<link>" tags inside the body, to enter css.

Instead you could use JHTML:stylesheet("style.css","path");
which puts links to the head.

2) The use of numbers as ids. This is also produces invalid code.
Maybe you could insert a char before the number (ex. a1,a2) and then use intval or a function like that to take the integer part.

Hope to help !!