var on = new Array('images/company_over.gif','images/products_over.gif','images/services_over.gif','images/support_over.gif');
var off = new Array('images/company.gif','images/products.gif','images/services.gif','images/support.gif');
var button_names = new Array('company','products','services','support');

function RR_findObj(n, d) { 
  var p,i,x;  if(!d) d=window.parent.frames[0].document; 
  if(d.all) x=d.all[n];
  if(!x && document.getElementById) x=d.getElementById(n); return x;
   
}

function menu_swap() { 
  var x,a=menu_swap.arguments;
  for (i=0; i<4;i++) 
  	if(a[0]==button_names[i]){x=RR_findObj(a[0]); x.oSrc=x.src=on[i];}
	else {x=RR_findObj(button_names[i]); x.oSrc=x.src=off[i];}
}