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<!DOCTYPE html> <html> <body> <p>Counting with a local variable.</p> <button type="button" onclick="myFunction()">Count!</button> <p id="demo">0</p> <script> function add() { var counter = 0; return counter += 1; } function myFunction(){ document.getElementById("demo").innerHTML = add(); } </script> </body> <!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_function_counter2 by HTTrack Website Copier/3.x [XR&CO'2014], Fri, 23 Jan 2015 07:36:24 GMT --> </html>
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