function validateEmail() {

      if (document.emailform.name.value.length == 0) {
         window.alert("Name is required");
         document.emailform.name.select(); 
         return false;
      }
      if (document.emailform.email.value.length == 0) {
         window.alert("Email address is required");
         document.emailform.email.select(); 
         return false;
      }
      if (document.emailform.subject.value.length == 0) {
         window.alert("Subject is required");
         document.emailform.subject.select(); 
         return false;
      }
      if (document.emailform.comments.value.length == 0) {
         window.alert("Comments are required");
         document.emailform.comments.select(); 
         return false;
      }
      return true;
}