function TActionDeterminator()
{
document.billform.action = './checkout.pcx2.html?processCheck=1&use_ach=1';
document.billform.switchtocheck.value = 1;
return true;
}
function ActionDeterminator()
{
document.billform.action = './checkout.p.html?processCheck=1&use_ach=1';
document.billform.switchtocheck.value = 1;
return true;
}

//shows/hides an id
function showhide(myId) {
	if (document.getElementById) {
		state = document.getElementById(myId).style.display
		if (state == 'block') {
			hideId(myId)
			return false
		}
		else {
			showId(myId)
			return false
		}
	}
}

//hides an id
function hideId(myId) {
	if (document.getElementById) {
		document.getElementById(myId).style.display = 'none'
	}
}

//shows an id
function showId(myId) {
	if (document.getElementById) {
		document.getElementById(myId).style.display = 'block'
	}
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

var ShipFirst = "";
var ShipLast = "";
var ShipAddress1 = "";
var ShipAddress2 = "";
var ShipCity = "";
var ShipState = "";
var ShipZip = "";
var ShipPhone = "";
var ShipCountry = "";
var ShipEmail = "";

function InitSaveVariables(form) {
ShipFirst = form.ShipFirst.value;
ShipLast = form.ShipLast.value;
ShipAddress1 = form.ShipAddress1.value;
ShipAddress2 = form.ShipAddress2.value;
ShipCity = form.ShipCity.value;
ShipZip = form.ShipZip.value;
ShipState = form.ShipState.value;
ShipPhone = form.ShipPhone.value;
ShipCountry = form.ShipCountry.selectedIndex;
ShipEmail = form.ShipEmail.value;
}

function ShipToBillPerson(form) {
if (form.copy.checked) {
InitSaveVariables(form);
form.ShipFirst.value = form.BillFirst.value;
form.ShipLast.value = form.BillLast.value;
form.ShipAddress1.value = form.BillAddress1.value;
form.ShipAddress2.value = form.BillAddress2.value;
form.ShipCity.value = form.BillCity.value;
form.ShipZip.value = form.BillZip.value;
form.ShipState.value = form.BillState.value;
form.ShipPhone.value = form.BillPhone.value;
form.ShipCountry.selectedIndex = form.BillCountry.selectedIndex;
form.ShipEmail.value = form.BillEmail.value;
}
else {
form.ShipFirst.value = ShipFirst;
form.ShipLast.value = ShipLast;
form.ShipAddress1.value = ShipAddress1;
form.ShipAddress2.value = ShipAddress2;
form.ShipCity.value = ShipCity;
form.ShipZip.value = ShipZip;
form.ShipState.value = ShipState;
form.ShipPhone.value = ShipPhone;
form.ShipCountry.selectedIndex = form.ShipCountry.selectedIndex;
form.ShipEmail = form.ShipEmail.value;
   }
}
<!-- Copyright 2003 Bontrager Connection, LLC
// See article "Changing Form Action URLs On-The-Fly" linked 
// from URL http://willmaster.com/possibilities/archives 
// for more information about how to use this code.
// -->
function popup(url, w, h, s) {
	var windowWidth= (w) ? w : 500;
	var windowHeight= (h) ? h : 500;
	var windowX=0;
	var windowY=0;
               var scrollOption= (s) ? s : "no";
	var autocenter = true;

	if(autocenter) {
		windowX = (window.screen.width-windowWidth)/2;
		windowY = (window.screen.height-windowHeight)/2;
	}
	popup_window = window.open(url,'','menubar=no,toolbar=no,titlebar=no,status=no,scrollbars='+scrollOption+',resizable=yes,width='+windowWidth+',height='+windowHeight+'');
	popup_window.moveTo(windowX,windowY);
}