Copy Billing Address to Shipping Address on VF Page Using JavaScript
  Class Code   public class CopyAddressFromBillToShip{      public String BCountry { get; set; }      public String BZip { get; set; }      public String BState { get; set; }      public String BCity { get; set; }      public String BStreet { get; set; }      public String SCountry { get; set; }      public string SZip { get; set; }      public String SState { get; set; }      public String SCity { get; set; }      public String SStreet { get; set; }  }    Page Code    <apex:page controller="CopyAddressFromBillToShip" >     <apex:form id="myform">      <script type="text/javascript">          function addressCopy(bstreet1, bcity1, bstate1, bPostalCode1, bcountry1, sstreet1, scity1, sstate1, SPostalCode1, scountry1) {      document.getElementById(sstreet1).value = document.getElementById(bstreet1).value;    ...