function Mouse_Over()
{
document.getElementById("button_sx").className='button_sx_hover';
document.getElementById("button_dx").className='button_dx_hover';

document.getElementById("button_cx").className='button_cx_hover';
}

function Mouse_Out()
{
document.getElementById("button_sx").className='button_sx';
document.getElementById("button_dx").className='button_dx';

document.getElementById("button_cx").className='button_cx';

}