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Showing posts from November 21, 2016

JavaScript code for a simple form VALIDATION

JavaScript code  for a simple form VALIDATION <html>       <head>       <title> Form Validation </title>              <script type = "text/javascript" > function validate ()       {          if ( document . myForm . Name . value == "" )          {             alert ( "Please provide your name!" );             document . myForm . Name . focus () ;             return false ;          }           if ( document . myForm . EMail . value == "" )          {             alert ( "Please provide your Email!" );             document . myForm . EMail . focus () ;             return false ;          }          if ( document . myForm . Zip . value == "" ||          isNaN ( document . myForm . Zip . value ) ||          document . myForm . Zip . value . length != 5 )          {             alert ( "Please provide a zip in the format #####." );     
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JavaScript code for email validation

JavaScript codes  for email validation <script type = "text/javascript" >    <!--       function validateEmail ()       {          var emailID = document . myForm . EMail . value ;          atpos = emailID . indexOf ( "@" );          dotpos = emailID . lastIndexOf ( "." );                   if ( atpos < 1 || ( dotpos - atpos < 2 ))           {             alert ( "Please enter correct email ID" )             document . myForm . EMail . focus () ;             return false ;          }          return ( true );       }    //--> </script>
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JavaScript code to show how to use a throw statement

JavaScript code to show how to use a throw statement . <html>       <head>        <script type = "text/javascript" >          <!--             function myFunc ()             {                var a = 100 ;                var b = 0 ;                  try {                   if ( b == 0 ){                      throw ( "Divide by zero error." );                    }                   else                   {                      var c = a / b ;                   }                }                    catch ( e ) {                   alert ( "Error: " + e );                }             }          //-->       </script>          </head>       <body>       <p> Click the following to see the result: </p>             <form>          <input type = "button" value = "Click Me" onclick = " myFunc (); " />       <
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