Corona Warrior : Validation in JavaScript Using Regular Expression

Tuesday, July 3, 2012

Validation in JavaScript Using Regular Expression

<script type="text/javascript">
                function ValidateInput(evt)
                {
                  var valRegExp = new RegExp("^[a-zA-Z0-9]");
                  if (valRegExp.test(String.fromCharCode(evt.which)))
                  {
                      return true;
                  }
                  else
                  {
                      return false;
                  }
                }
           </script>
      </head>
      <body>
           <label for="txtUsername">Username</lable>
           <input type="text" id="txtUsername" placeholder="Enter Username" onkeypress="return ValidateInput(event)"/>
      </body>

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