Menu Parent/Child

Hi everyone, So on my blog I have multiple subjects and multiple sub-categories and therefore the drop down is fairly large 3-4 subs. On my 21" screen I can drop down easily but on my 15" laptop I expands to the right and I can't see the drop down for the items. Is there any code I can alter or add to fix this issue so I can view this. Example on my blog: www.bowsersays.ca go under reviews, books, and follow the rest Thanks in advance, Philip.