function swap(pic,n)
{    
  if(n == 1) { document.getElementById("nav-menu1").style.border="1px solid #beb";}
  if(n == 2) { document.getElementById("nav-menu1").style.border="1px solid #fff"; }
  if(n == 3) { document.getElementById("nav-menu2").style.border="1px solid #beb"; }
  if(n == 4) { document.getElementById("nav-menu2").style.border="1px solid #fff"; }
  if(n == 5) { document.getElementById("nav-menu3").style.border="1px solid #beb"; }
  if(n == 6) { document.getElementById("nav-menu3").style.border="1px solid #fff"; }
  if(n == 7) { document.getElementById("nav-menu4").style.border="1px solid #beb"; }
  if(n == 8) { document.getElementById("nav-menu4").style.border="1px solid #fff"; }
}