I am attempting to have retractable sidebars on a website project (found at http://ohigro.com/index-dropdowntest.html). Dreamweaver CS3 helped me do the retracting, but I would like to have an arrow indicate the status of the sidebar (so users of the site will know the headers will retract or expand - I intend to make the "initial" status of the bottom two sidebars pre-retracted.)

I imagine this is very simple to accomplish with some javascript code or perhaps a clever use of the "onclick" property. If someone could be of assistance or could point me in the right direction, I would be very thankful.