// JavaScript Document
function checkcommentform () {
  if (document.commentform.name.value == "") {
    alert("Please enter your name.");
    document.commentform.name.focus();
    return false;
  }
  if (document.commentform.email.value == "") {
    alert("Please enter your email address. It will not be published.");
    document.commentform.email.focus();
    return false;
  }
  if (document.commentform.email.value.indexOf("@") == -1) {
    alert("Please enter a valid email address. It will not be published.");
    document.commentform.email.focus();
    return false;
  }
  if (document.commentform.email.value.indexOf(".") == -1) {
    alert("Please enter a valid email address. It will not be published.");
    document.commentform.email.focus();
    return false;
  }
  if (document.commentform.message.value == "") {
    alert("Please enter a comment before submitting the form.");
    document.commentform.message.focus();
    return false;
  }
}