ASP.NET 2.0中轻松实现网站换肤

>
            <button class=btn3_mouseout 
            onmouseover="this.className='btn3_mouseover'"
             onmouseout="this.className='btn3_mouseout'"
             onmousedown="this.className='btn3_mousedown'"
              onmouseup="this.className='btn3_mouseup'" onclick="this.blur();"
            > Buttonbutton>
            <P>
            <button class=btn_2k3>2k3 Button> 
            body>