function validateForm()
  {
      var PTCheckbox;
      var LicSelectCombo;
      var VIP1checkbox;
      var VIP2checkbox;
      
      PTCheckbox = document.getElementById('PT');
      LicSelectCombo = document.getElementById('select_license');
      VIP1checkbox = document.getElementById('VIP1');
      VIP2checkbox = document.getElementById('VIP2');

      if ((VIP1checkbox !== null) && (VIP2checkbox !== null)) {

      if (LicSelectCombo !== null) {
        if (PTCheckbox.checked) {
          LicSelectCombo.disabled = false;
        }  else {
          LicSelectCombo.disabled = true;
        }
      
        if ((LicSelectCombo.value == '1') || (LicSelectCombo.disabled)) {
         VIP1checkbox.disabled = false;
         VIP2checkbox.disabled = false;
        } else {
         VIP1checkbox.disabled = true;
         VIP2checkbox.disabled = true;
         VIP1checkbox.checked = false;
         VIP2checkbox.checked = false;
        }
      } else {
        VIP1checkbox.disabled = false;
        VIP2checkbox.disabled = false;
      }
      }
      
  }
  
function validateFormVIP(num) 
{
     var VIP1checkbox;
     var VIP2checkbox;
     var PTCheckbox;
     
     VIP1checkbox = document.getElementById('VIP1');
     VIP2checkbox = document.getElementById('VIP2');
     
     if (num == 2) {
      if (VIP2checkbox.checked) VIP1checkbox.checked = false;
      if (VIP1checkbox.checked) VIP2checkbox.checked = false;
      
      if (VIP2checkbox.checked) {
        PTCheckbox = document.getElementById('PT');
        if (PTCheckbox.checked == false) alert("Remember: Buying the Platinum VIP package alone does not give you a license to use jv16 PowerTools. In order to use jv16 PowerTools, you must own or buy a license for it.");
      }
     } else {
      if (VIP1checkbox.checked) VIP2checkbox.checked = false;
      if (VIP2checkbox.checked) VIP1checkbox.checked = false;
      
      if (VIP1checkbox.checked) {
        PTCheckbox = document.getElementById('PT');
        if (PTCheckbox.checked == false) alert("Remember: Buying the VIP package alone does not give you a license to use jv16 PowerTools. But if you use PowerTools Lite, buying a VIP entitles you to receive technical support for it.");
      }
     }
     
     
     validateForm();

}
  
function hideElement(obj)
  {
      var obj1;
      obj1 = document.getElementById(obj);
      if (obj1 !== null) {
        obj1.style.visibility = 'hidden';
        obj1.style.display = 'none';
      }  
  }
  
function showElement(obj)
  {
      var obj1;
      obj1 = document.getElementById(obj);
      if (obj1 !== null) {
        obj1.style.visibility = 'visible';
        obj1.style.display = 'inline';
      }
  }

function updateOrderForm()
  {
      validateForm();
  }
  
function supportClick1()
  {
      var obj1;
      obj1 = document.getElementById('support_none');
      obj1.checked = true;
      
      obj1 = document.getElementById('support_six');
      obj1.checked = false;
      
      obj1 = document.getElementById('support_nine');
      obj1.checked = false;
      
      obj1 = document.getElementById('support_life');
      obj1.checked = false;
  }
  
function supportClick2()
  {
      var obj1;
      obj1 = document.getElementById('support_none');
      obj1.checked = false;
      
      obj1 = document.getElementById('support_six');
      obj1.checked = true;
      
      obj1 = document.getElementById('support_nine');
      obj1.checked = false;
      
      obj1 = document.getElementById('support_life');
      obj1.checked = false;
  }
  
function supportClick3()
  {
      var obj1;
      obj1 = document.getElementById('support_none');
      obj1.checked = false;
      
      obj1 = document.getElementById('support_six');
      obj1.checked = false;
      
      obj1 = document.getElementById('support_nine');
      obj1.checked = true;
      
      obj1 = document.getElementById('support_life');
      obj1.checked = false;
  }
  
function supportClick4()
  {
      var obj1;
      obj1 = document.getElementById('support_none');
      obj1.checked = false;
      
      obj1 = document.getElementById('support_six');
      obj1.checked = false;
      
      obj1 = document.getElementById('support_nine');
      obj1.checked = false;
      
      obj1 = document.getElementById('support_life');
      obj1.checked = true;
  }