<!-- Hide script from old browsers


function checkforblanks() {

  for (var i = 0; i < arguments.length; i += 2) {
    if (!arguments[i]) {
      alert("Please enter " + arguments[i+1] + ".");
      return false;
      }
    }
  return true;
}

 
function validate() {
	   
  // Make sure none of the required fields are empty

  var isFull = checkforblanks(document.book.elements[0].value,"your first and last name",document.book.email.value,"your email address");

  if(isFull == "") {
     return false;
  }   
					   
  emailad = document.book.email.value;
  var exclude=/[^@\-\.\w]|^[_@\.\-]|[\._\-]{2}|[@\.]{2}|(@)[^@]*\1/;
  var check=/@[\w\-]+\./;
  var checkend=/\.[a-zA-Z]{2,4}$/;

  if(((emailad.search(exclude) != -1)||(emailad.search(check)) == -1)||(emailad.search(checkend) == -1)) {
    alert("Your email address is not correct, please check!");   
    return false;
  }
    
}

// End hiding script from old browsers -->