Simple dropdown and ie6 problem

I have created a dropdown menu with jquery: here Everything is ok but in ie6. I know ie6 not supported z-index, but is there any solu开发者_如何学编程tion for ie6? Thanks in advance

hotfile.com uses CSS to achive this effect so that it also works in IE6.
Have a look at the section 2.2 in the CSS file.