function cs_nav_hover(id) {
  var navi = new Array("main", "clan", "service", "contact");
  for (a=0; a < navi.length; a++) {
    if(id != navi[a]) { 
	  document.getElementById("img_" + navi[a]).src = 'templates/orange_mix/images/button_' + navi[a] + '.jpg';
	  document.getElementById("sub_" + navi[a]).style.display = 'none';
	}
  }
  document.getElementById("img_" + id).src = 'templates/orange_mix/images/button_' + id + '_on.jpg';
  document.getElementById("sub_" + id).style.display = 'block';
}