Offsetting an html anchor to adjust for fixed header

You could just use CSS without any javascript.

Give your anchor a class:

You can then position the anchor an offset higher or lower than where it actually appears on the page, by making it a block element and relatively positioning it. -250px will position the anchor up 250px

a.anchor {
display: block;
position: relative;
top: -250px;
visibility: hidden;
}

See: http://stackoverflow.com/questions/10732690/offsetting-an-html-anchor-to...