function on1() 
{if (!document.images) return; document.a.src = "images/butaboutsel.gif";} 
function on2() 
{if (!document.images) return; document.b.src = "images/butcatalogsel.gif";}
function on3() 
{if (!document.images) return; document.c.src = "images/butservicessel.gif";}
function on4() 
{if (!document.images) return; document.d.src = "images/butsupportsel.gif";}
function on5() 
{if (!document.images) return; document.e.src = "images/butcontactsel.gif";}
function on6() 
{if (!document.images) return; document.f.src = "images/butt_home_sel.gif";}
function on7() 
{if (!document.images) return; document.g.src = "images/butsitemapsel.gif";}

function off1() 
{if (!document.images) return; document.a.src = "images/butt_about.gif";}
function off2() 
{if (!document.images) return; document.b.src = "images/butt_catalog.gif";}
function off3() 
{if (!document.images) return; document.c.src = "images/butt_services.gif";}
function off4() 
{if (!document.images) return; document.d.src = "images/butt_support.gif";}
function off5() 
{if (!document.images) return; document.e.src = "images/butt_contact.gif";}
function off6() 
{if (!document.images) return; document.f.src = "images/butt_home.gif";}
function off7() 
{if (!document.images) return; document.g.src = "images/butt_sitemap.gif";}

var imgslist = new Array(
"images/lable_about_sel.gif",
"images/lable_catalog_sel.gif",
"images/lable_services_sel.gif",
"images/lable_support_sel.gif",
"images/lable_contact_sel.gif",
"images/lable_home_sel.gif",
"images/labelbar_sitemap_sel.gif"); 

var imgs=new Array(); 
for (x=0; x<imgslist.length; x++) 
 if (document.images) 
  {imgs[x]=new Image(); imgs[x].src = imgslist[x];}