if (document.images) {

	//primary links
	
	pre_opon = new Image();
	pre_opon.src = "i/pre_op_on.gif";
	pre_opoff = new Image();
	pre_opoff.src = "i/pre_op_off.gif";

	post_opon = new Image();
	post_opon.src = "i/post_op_on.gif";
	post_opoff = new Image();
	post_opoff.src = "i/post_op_off.gif";
	
	contacton = new Image();
	contacton.src = "i/contact_on.gif";
	contactoff = new Image();
	contactoff.src = "i/contact_off.gif";
	
	homeon = new Image();
	homeon.src = "i/home_on.gif";
	homeoff = new Image();
	homeoff.src = "i/home_off.gif";
	
	payon = new Image();
	payon.src = "i/pay_on.gif";
	payoff = new Image();
	payoff.src = "i/pay_off.gif";
	
}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}

//pop up
function openAnyWindow(url, name) {
  var l = openAnyWindow.arguments.length;
  var w = "";
  var h = "";
  var features = "";

  for (i=2; i<l; i++) {
    var param = openAnyWindow.arguments[i];
    if ( (parseInt(param) == 0) ||
      (isNaN(parseInt(param))) ) {
      features += param + ',';
    } else {
      (w == "") ? w = "width=" + param + "," :
        h = "height=" + param;
    }
  }

  features += w + h;
  var code = "popupWin = window.open(url, name";
  if (l > 2) code += ", '" + features;
  code += "')";
  eval(code);
}