Finding Non-matching Characters

« Previous Next »

Write a javascript code to find the non-matching characters.

<html>
  <head>
     <script>

         var p = /[^abc]/; 
    
         function testMatch() 
         {
             var str = document.getElementById("textfield").value; 
             if (p.test(str)) 
             {
                 alert("The string \"" + str + "\" contains characters other than a, b, or c.");
             } 
             else 
             {
                 alert("The string \"" + str + "\" does not contain characters other than a, b, or c.");
             }
         }

     </script>
  </head>
<body>

         <h3> Checking the availability of a string </h3>

         Enter the String: <input type="text" id="textfield" />

         <input type="button" value="Check" onclick="testMatch();" />

  </body>
</html>

Output:

« Previous Next »