function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function validateForm() {
 var username = document.form1.name_field.value;
 var usermail = document.form1.email_field.value;
 var usercomment = document.form1.comment_field.value;
 if (username == "") {
   alert("No name? You must have a name!");
   return false;
 }
 else if ((usermail.indexOf(".") <= 0) || (usermail.indexOf("@") <= 0)) {
   alert("Sorry, this is not a valid email address");
   return false;
 } 
 else if (usercomment == "") {
   alert("Nothing to say? You can do better than that!");
   return false;
 }
 else if (usercomment.search(/viagra|jloo|mtiffsuo|jeeee|zomig|zzz|goldprice/i)!=-1) {
   alert("No spam please!");
   return false;
 }
 else
 {
  return true; 
  }
}