#product_button { 
width : 88px; 
height : 15px;
background:url(../images/but_products.gif); 
}

#product_button:hover { 
background:url(../images/but_products_f2.gif); 
}

#datasheets_button { 
width : 98px; 
height : 15px;
background:url(../images/but_datasheets.gif); 
}

#datasheets_button:hover { 
background:url(../images/but_datasheets_f2.gif); 
}