📄 ch8_examp2.htm

📁 javascript source code part1

💻 HTM

字号:

<HTML>
<BODY>
<SCRIPT LANGUAGE=JavaScript>

function regExpIs_valid(text)
{
   var myRegExp = /[^a-z\d ]/i;
   return !(myRegExp.test(text));
}

function butCheckValid_onclick()
{
   if (regExpIs_valid(document.form1.txtPhrase.value) == true)
   {
      alert("Your passphrase contains valid characters");
   }
   else
   {
      alert("Your passphrase contains invalid characters");
   }
}

</SCRIPT>
<FORM NAME=form1>
Enter your passphrase:
<BR>
<INPUT TYPE="text" NAME=txtPhrase>
<BR>
<INPUT TYPE="button" VALUE="Check Character Validity" NAME=butCheckValid
   onclick="butCheckValid_onclick()">
</FORM>
</BODY>
</HTML>

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