锚点链接从标题下方开始，标题位于顶部

I have a page which has a fixed header at the top, which is 63px in height. below this I have different sections of the page (divs) which are in essence separate pages. Each section is linked in the header as an anchor link to the relevant div id. The problem I am having is that when the anchor link is clicked the top of the div starts right at the top of the document, rather than underneath the header. Any solution would be very helpful indeed.I have a page which has a fixed header at the t