Hello!!!: 11月 2013

2013年11月10日星期日

Homework 11-5-2013

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <meta http-equiv="Content-Script-Type" content="text/javascript">
    <script type="text/javascript">
      var re = /\(?\d{3}\)?([-\/\.])\d{3}\1\d{4}/;
      function check(){
    var OK = re.exec(f.q.value);
        if (!OK)
          {window.alert(RegExp.input + " isn't a phone number with area code!");
         f.q.value="";
        document.f.q.focus();
        return false; }
         else
       window.alert("Thanks, your phone number is " + OK[0]);

}
    </script>
</head>
<body>
    <p>Enter your phone number (with area code) and then click "Check".
        <br>The expected format is like ###-###-####.</p>
    <form name="f" action="#" onsubmit="return check()" method="get">
       check:<input type="text" name="q">
     <input id="phone" type="submit" value="check">
    </form>
</body>
</html>