function checkForm()
{
   var cemail, csenderrname, cecard;
   with(window.document.theecard)
   {
      csenderrname    = senderrname;
      cemail   = email;
      cecard = ecard;
         }

   if(trim(csenderrname.value) == '')
   {
      alert('Please enter your name');
      csenderrname.focus();
      return false;
   }
   else if(trim(cemail.value) == '')
   {
      alert('Please enter the recipients email');
      cemail.focus();
      return false;
   }
   else if(trim(cecard.value) == '')
   {
      alert('Please select a card');
      cecard.focus();
      return false;
   }
   else
   {
      csenderrname.value    = trim(csenderrname.value);
      cemail.value   = trim(cemail.value);
      cecard.value = trim(cecard.value);
      return true;
   }
}

function trim(str)
{
   return str.replace(/^\s+|\s+$/g,'');
}