I've run into a situation where using Javascript to change an element's textDecoration property will prevent the element's CSS :hover selector from changing text-decoration any further. This is illustrated at <http://www.typeleft.com/files/onmouseover_vs_csshover/index2.html>. :hover over the header. click on the image. :hover over the header again. observe how only 1 of the CSS rules continue to work. This occurs in at least ff 1.0 and ie6. Any advice? Izaak