function swapImage(img_name,img_src) {
        document[img_name].src=img_src;
      }

      function openPicture(url) {
         popupWin = window.open(url, 'newwin', 'width=425,height=400,scrollbars=yes')
      }

function ValidateRequired(formField,fieldLabel)
{
   var result = true;
	
   if (formField.value == "")
   {
      alert('Please enter a value for the "' + fieldLabel +'" field.');
      formField.focus();
      result = false;
   }
	
   return result;
}


function ValidateForm(theForm)
{
  
   if (!ValidateRequired(theForm.name,"Name"))
      return false;

   if (!ValidateRequired(theForm.email,"Email"))
      return false;

   if (!ValidateRequired(theForm.enquiry_type,"Enquiry Type"))
      return false;

   return true;
}