Modal window problems

A) On a website, i use thickbox to open some modal windows. All appear well, except from the times i use that site from my laptop. The links look like this: <a hrf="[login to view URL]" class="thickbox">text/imag here</a> On my laptop i have several toolbars installed, which affect the height of screen. When the modal window opens, the close button (top right corner) vanishes behind the toolbars (actually some portion of the top section of the modal vanishes - not only the button). About 50px are vanishing behind the toolbars. Is there someway to prevent this? And i don't mean to change the height of the window. The height must remain as is now. I was wandering if there is a solution to force the modal to appear below the toolbars. Or perhaps to change thickbox with some other script? B) Another issue with modals I have. If content is longer than the height of the modal, a scroll bar appears. Is there away to negate this and use the website scrollbar instead? I mean, force the modal to not have scrollbars (perhaps with overflow:hidden?) and instead, use the toolbars from main/parent screen to scroll down?