#details_en
{display: block; width: 188px;height: 15px;background: url("images/menu_button_details_en.gif") no-repeat 0 0;}
#details_en
{background-position: 0 -15px;}
#details_en span
{display: none;}
#details_en:hover
{background-position: 0 -15px;}
#details_en span
{display: none;}
  
#specs_en
{display: block; width: 188px;height: 15px;background: url("images/menu_button_specs_en.gif") no-repeat 0 0;}
#specs_en:hover
{background-position: 0 -15px;}
#specs_en span
{display: none;}