if(document.images) {
  mn1_d = new Image(); mn1_d.src = "images/menu_webdesign.gif";  mn1_u = new Image(); mn1_u.src = "images/menu_webdesign_hover.gif";
  mn2_d = new Image(); mn2_d.src = "images/menu_other.gif";  mn2_u = new Image(); mn2_u.src = "images/menu_other_hover.gif";  
  mn3_d = new Image(); mn3_d.src = "images/menu_clients.gif";  mn3_u = new Image(); mn3_u.src = "images/menu_clients_hover.gif";  
  mn4_d = new Image(); mn4_d.src = "images/menu_about.gif";  mn4_u = new Image(); mn4_u.src = "images/menu_about_hover.gif";  
  mn5_d = new Image(); mn5_d.src = "images/menu_articles.gif";  mn5_u = new Image(); mn5_u.src = "images/menu_articles_hover.gif";  
}

function di(id,name){
  if (document.images) {document.images[id].src=eval(name+".src"); }  
}