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 isValid(main){
  if(main.content.value==""){
    alert("Please fill in the content.");
    main.content.focus();
    return false;
  }
  if(main.name.value==""){
    alert("Please fill in your name.");
    main.name.focus();
    return false;
  }
  if(main.tel.value==""){
    alert("Please fill in the telephone.");
    main.tel.focus();
    return false;
  }
  if(main.email.value!=""){
   if(main.email.value.indexOf("@")==-1 || main.email.value.indexOf(".")==-1 ||  main.email.value.length<10){
     alert("Please fill in a valid email address.");
     main.email.focus();
     return false;
   }
  }
  if(main.passtype.value!="none"){
    if(main.passnum.value==""){
      alert("Since you choose ID type, please fill in your ID number.");
      main.passnum.focus();
      return false;
    }
  }
   if(main.passnum.value!=""){
    if(main.passtype.value=="none"){
      alert("Since you fill in your ID number, please choose ID type.");
      main.passtype.focus();
      return false;
    }
  }
  return true;
}