Tumblr dropdown navigation

Hi Freelancers, I'm looking for someone urgently who knows how to do dropdown functionality in Tumblr... (and who can preferably show by example - please show me one site you've implemented it in). Ideally someone who is immediately available and who can get to work straightaway. And please show me in your response that you have actually read my requirement by writing the word 'Wednesday' at the top of your response... You can show me on your server first, but payment will NOT be made until you've shown me the product working as I require (I have a diagram which will assist you) then I will pay and then you can release the product. For someone talented this should be a very simple and straightforward piece of work. Many thanks, Paul