JavaScript Functions Example

            <!DOCTYPE html>
<html>
<head>
  <title>JavaScript Functions Example</title>
</head>
  <body>
   <h2>JavaScript Functions Example</h2>
    <button type= "button"; onclick= demo();>click</button>

      <script>  
       function demo(){  
       	window.alert("this is function");  
       }  
      </script>  
  </body>
</html>
        

            
        