I’ve revisited this post here – Revisiting HTML5 placeholder fixes I recommend you check that update out.
One of the nifty new features of HTML5 is the placeholder for forms which is added by putting in a placeholder value.
So I can use this everywhere I’ve just written a quick bit of jQuery to replicate the placeholder functionality in browser that don’t support. It also uses Modernizr to check if the browser already supports the placeholder technique.