function erase() {
   window.status="";
}
function stat(txt) {
   window.status = txt;
   setTimeout("erase()",1500);
}
function test(form, button) {
  if (button.name == "button1") test1(form);
  if (button.name == "button2") test2(form);
}
function test1(form) {
  if (form.text1.value == "")
    alert("Please enter a string!")
  else { 
   alert("Hi "+form.text1.value+"! Form input ok!");
  }
}
function test2(form) {
  if (form.text2.value == "" || 
      form.text2.value.indexOf('@', 0) == -1) 
        alert("No valid e-mail address!");
  else alert("OK!");
}

function check(input) {
  var ok = true;

  for (var i = 0; i < input.length; i++) {
    var chr = input.charAt(i);
    var found = false;
    for (var j = 1; j < check.length; j++) {
      if (chr == check[j]) found = true;
    }
    if (!found) ok = false;
  }
 
  return ok;
}

function test(input) {

  if (!check(input, "1", "2", "3", "4",
        "5", "6", "7", "8", "9", "0", "/", "-", " ")) {

    alert("Input not ok.");
  }
  else {
    alert("Input ok!");
  }
}