// focus on the search form etc if it exists
    function search_form_focus()
      {
      
        if (document.getElementById('search_string'))
          {
            document.getElementById('search_string').focus();
          }

        if (document.getElementById('vis_text'))
          {
            document.getElementById('vis_text').focus();
          }

        if (document.getElementById('kb_search_text'))
          {
            document.getElementById('kb_search_text').focus();
          }
                
      }

// search form field checker
    function validate_search_form()
      {
      
        if (document.getElementById('search_string').value == "")
          {
            alert("Search Error: There is no text in the search box"); return false;
          }
        else
          {
            return true;
          }
                
      }

// contact form field checker
    function CheckMailer()
      {
        var epicfail = 0;
        if ((document.getElementById('first_name').value == "") || (document.getElementById('last_name').value == "") || (document.getElementById('company').value == "") || (document.getElementById('address1').value == "") || (document.getElementById('postcode').value == "") || (document.getElementById('phone').value == "") || (document.getElementById('email').value == ""))
          {
            epicfail = 1;
          }

        if (epicfail  > 0)
          {
            alert("Please complete the following fields before submitting your enquiry: \r\n - full name \r\n - company \r\n - address line 1 \r\n - post code \r\n - telephone numer \r\n - email address");
            return false;
          }
        else
          {
            return true;
          }
      }

// print the page
    function PrintPage()
      {
        print();
      }

// registration page TP Code yes-no
    function TP_Code(TP_Answer)
      {
        if (TP_Answer == 1)
          {
            document.getElementById('reg_tpcode').disabled=false;
            document.getElementById('TP_Lookup_Button').disabled=false;
          }
        else
          {
            document.getElementById('reg_tpcode').disabled=true;
            document.getElementById('TP_Lookup_Button').disabled=true;
          }
      }

// toggle company field depending on account type
    function ToggleCompanyField(CompanyAnswer)
      {
        if (CompanyAnswer == 1)
          {
            document.getElementById('reg_companyname').disabled=false;
          }
        else
          {
            document.getElementById('reg_companyname').disabled=true;
          }
      }

// registration page TP section mod for non UK
    function TP_CountryMod()
      {
        if (document.getElementById('reg_country').value != "United Kingdom")
          {
            
          }
        else
          {
            
          }
      }

// registration form TP lookup 1
    function TP_Lookup()
      {
      
      if (document.getElementById('reg_tpcode').value == "")
          {
            alert("Please enter a valid TP Code.");
            return false;
          }
      else
          {
        
        document.getElementById('TP_Lookup_Button').disabled=true;
        
        var xmlHttp;
          try
            {
              // Firefox, Opera 8.0+, Safari
              xmlHttp=new XMLHttpRequest();
            }
          catch (e)
            {
              try
                {
                  // IE MS XML2
                  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
                }
              catch (e)
                {
                  try
                    {
                      // IE MS XML
                      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
                    }
                  catch (e)
                    {
                      //alert("Your browser does not support AJAX");
                      return false;
                    }
                }
            }
          xmlHttp.onreadystatechange=function()
            {
            if(xmlHttp.readyState==4)
              {
               document.getElementById("TP_Lookup_Result").innerHTML=xmlHttp.responseText;
               document.getElementById('TP_Lookup_Button').disabled=false;
              }
            }
          var url="db_tplookup.asp";
          url=url+"?reg_postcode="+document.getElementById('reg_postcode').value+"&reg_tpcode="+document.getElementById('reg_tpcode').value+"&reg_country="+document.getElementById('reg_country').value;
          xmlHttp.open("GET",url,true);
          xmlHttp.send(null);
          
        }
      }

// registration form TP lookup 2
    function TP_Lookup2()
      {
      
      if ((document.getElementById('tp_check2').value == "yes") || (document.getElementById('reg_country').value != "United Kingdom") || (document.getElementById('reg_postcode').value == "") || (document.getElementById('reg_postcode').value.indexOf(" ") < 1) || (document.getElementById('reg_tpid').value != ""))
          {
            return false;
          }
      else
          {
        var xmlHttp;
          try
            {
              // Firefox, Opera 8.0+, Safari
              xmlHttp=new XMLHttpRequest();
            }
          catch (e)
            {
              try
                {
                  // IE MS XML2
                  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
                }
              catch (e)
                {
                  try
                    {
                      // IE MS XML
                      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
                    }
                  catch (e)
                    {
                      //alert("Your browser does not support AJAX");
                      return false;
                    }
                }
            }
          xmlHttp.onreadystatechange=function()
            {
            if(xmlHttp.readyState==4)
              {
               document.getElementById('tp_check2').value="yes";
               document.getElementById("TP_Lookup_Result").innerHTML=xmlHttp.responseText;
               
              }
            }
          var url="db_tplookup2.asp";
          url=url+"?reg_postcode="+document.getElementById('reg_postcode').value+"&reg_country="+document.getElementById('reg_country').value;
          xmlHttp.open("GET",url,true);
          xmlHttp.send(null);
          
        }
      }

// account update TP 
    function Update_TP()
      {
        var xmlHttp;
          try
            {
              // Firefox, Opera 8.0+, Safari
              xmlHttp=new XMLHttpRequest();
            }
          catch (e)
            {
              try
                {
                  // IE MS XML2
                  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
                }
              catch (e)
                {
                  try
                    {
                      // IE MS XML
                      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
                    }
                  catch (e)
                    {
                      //alert("Your browser does not support AJAX");
                      return false;
                    }
                }
            }
          xmlHttp.onreadystatechange=function()
            {
            if(xmlHttp.readyState==4)
              {
               document.getElementById("TP_Update_Result").innerHTML=xmlHttp.responseText;
               
              }
            }
          var url="db_tpupdate.asp";
          url=url+"?tp_code="+document.getElementById('change_tp_code').value;
          xmlHttp.open("GET",url,true);
          xmlHttp.send(null);          
      }

// registration form field checker
    function CheckReg()
      {
        if (document.getElementById('reg_firstname').value == "")
          {
            alert("Please complete the First Name field.");
            return false;
          }
        else if (document.getElementById('reg_lastname').value == "")
          {
            alert("Please complete the Last Name field.");
            return false;
          }
        else if ((document.getElementById('reg_email').value.length < 6) || (document.getElementById('reg_email').value.indexOf("@") < 1))
          {
            alert("Please enter a valid Email Address.");
            return false;
          }
        else if (document.getElementById('reg_password').value.length < 7)
          {
            alert("Please enter a valid Password.");
            return false;
          }
        else if (document.getElementById('reg_contactnum').value.length < 8)
          {
            alert("Please enter a valid Phone Number.");
            return false;
          }
        else if ((document.getElementById('reg_memdate').value.length < 10) || (document.getElementById('reg_memdate').value.indexOf("/") != 2) || (document.getElementById('reg_memdate').value.lastIndexOf("/") != 5) || (document.getElementById('reg_memdate').value.toLowerCase() == "dd/mm/yyyy"))
          {
            alert("Please enter a valid Memorable Date in DD/MM/YYYY format.\r\nFor example '02/06/1984' is valid.");
            return false;
          }
        else if ((document.getElementById('reg_companyname').disabled==false) && (document.getElementById('reg_companyname').value == ""))
          {
            alert("Please complete the Company Name field.");
            return false;
          }
        else if (document.getElementById('reg_addressline1').value == "")
          {
            alert("Please enter a valid Address.\r\nAddress lines one, three and four need to be completed.");
            return false;
          }
        else if (document.getElementById('reg_addressline3').value == "")
          {
            alert("Please enter a valid Address.\r\nAddress lines one, three and four need to be completed.");
            return false;
          }
        else if ((document.getElementById('reg_addressline2').value == "") && (document.getElementById('reg_addressline4').value == ""))
          {
            alert("Please enter a valid Address.\r\nAddress lines one, three and four need to be completed.");
            return false;
          }
        else if (document.getElementById('reg_postcode').value == "")
          {
            alert("Please enter a valid Postcode.");
            return false;
          }
        else if ((document.getElementById('reg_country').value == "United Kingdom")  && ((document.getElementById('reg_postcode').value.indexOf(" ") < 1) || (document.getElementById('reg_postcode').value.length < 5)))
          {
            alert("Please check that the UK Postcode you have entered is correct.\r\nPlease enter your Postcode in full and ensure that it includes the space in the middle.\r\nFor example 'RG1 5NG' is valid.");
            return false;
          }
        else if (document.getElementById('reg_termsagree').value == "0")
          {
            alert("Please indicate that you have read and accepted the terms and conditions to continue.");
            return false;
          }
        else
          {
            return true;
          }
      }

// checkout delivery address checker
    function CheckInfoAndSubmitToPayPal()
      {
        if (document.getElementById('BasketDelAddress1').value == "")
          {
            alert("Please enter a valid Delivery Address.\r\nAddress lines one, three and four need to be completed.");
            return false;
          }
        else if (document.getElementById('BasketDelAddress3').value == "")
          {
            alert("Please enter a valid Delivery Address.\r\nAddress lines one, three and four need to be completed.");
            return false;
          }
        else if (document.getElementById('BasketDelAddress4').value == "")
          {
            alert("Please enter a valid Delivery Address.\r\nAddress lines one, three and four need to be completed.");
            return false;
          }
        else if (document.getElementById('BasketDelPostCode').value == "")
          {
            alert("Please enter a valid Postcode.");
            return false;
          }
        else
          {
            document.getElementById("BasketCheckoutButtonDiv1").style.display='none';
            document.getElementById("BasketCheckoutButtonDiv2").style.display='inline';
            return true;
          }
      }
      
// doesnt do very much
  function DoNothing()
    {

    }    

// login form field checker
    function CheckLogin()
      {
        if ((document.getElementById('auth_username').value.length < 6) || (document.getElementById('auth_username').value.indexOf("@") < 1))
          {
            alert("Please enter a valid Email Address.");
            return false;
          }
        else if (document.getElementById('auth_password').value.length < 7)
          {
            alert("Please enter a valid Password.");
            return false;
          }
      }

// password reset form field checker
    function CheckReset()
      {
        if ((document.getElementById('reset_email').value.length < 6) || (document.getElementById('reset_email').value.indexOf("@") < 1))
          {
            alert("Please enter a valid Email Address.");
            return false;
          }
        else if ((document.getElementById('reset_memdate').value.length < 10) || (document.getElementById('reset_memdate').value.indexOf("/") != 2) || (document.getElementById('reset_memdate').value.lastIndexOf("/") != 5) || (document.getElementById('reset_memdate').value.toLowerCase() == "dd/mm/yyyy"))
          {
            alert("Please enter a valid Memorable Date in DD/MM/YYYY format.\r\nFor example '04/06/1984' is valid.");
            return false;
          }
      }

// re-send auth code form field checker
    function CheckResend()
      {
        if ((document.getElementById('resend_email').value.length < 6) || (document.getElementById('resend_email').value.indexOf("@") < 1))
          {
            alert("Please enter a valid Email Address.");
            return false;
          }
        else if ((document.getElementById('resend_memdate').value.length < 10) || (document.getElementById('resend_memdate').value.indexOf("/") != 2) || (document.getElementById('resend_memdate').value.lastIndexOf("/") != 5) || (document.getElementById('resend_memdate').value.toLowerCase() == "dd/mm/yyyy"))
          {
            alert("Please enter a valid Memorable Date in DD/MM/YYYY format.\r\nFor example '04/06/1984' is valid.");
            return false;
          }
      }


// grab contents of visible order ref field and copy to the hidden field
    function CopyOrderRef()
      {
         document.getElementById('OrderRefField').value = document.getElementById('BasketOrderRef').value;
      }