Mouseover effect using Javascript and css

Mouse over effect can be done by css e.g(button:hover{background:red;}.But this css will not work in IE6. So it needs to use java script for mouse over effect in a button .By using Javscript it can be possible to show mouseover effect in every browser.
The demo of this script is applied in the button given below.


This effect will work in every browser.The javascript of this button is given bellow

<input style="width:113px; height:31px; border:none; background:url(button.gif);" onmouseover="this.style.background='url(buttonHover.gif)';" onmouseout="this.style.background='url(button.gif)'" type="button" value="See here" />