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Editorial Team
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Asked: 2026-05-22T16:41:44+00:00

Here is my HTML/JavaScript: <!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Transitional//EN http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd> <html xmlns=http://www.w3.org/1999/xhtml>

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Here is my HTML/JavaScript:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
    <script type="text/javascript" src="/script/jquery.js"></script>
    <script type="text/javascript">
        $(function(){
            var $str = "hello world";

            function foo() {
                alert($str);
            }
        });
    </script>
</head>
<body>
    <form name="statusUpdateForm" method="post">
        <input type="button" name="submitButton" value=" " onclick="foo();" />
    </form>
</body>
</html>

When I click the button, I get a JavaScript error stating that foo is not defined. How can I call a JavaScript function declared inside document.ready()??

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1 Answer

  1. Editorial Team

    You’re placing the function’s scope within another function, basically.

    Picture this:

    <script>
  document.onload = function(){
    function foo(){
      alert('bar');
    }
  };
  foo();
</script>

    That is the facsimile of what you’re trying to accomplish. Just like variables defined within a function are off limits outside of it, function names take on the same characteristics.

    Side-Note JavaScript doesn’t require $ prefix on variable names (though is acceptable as far as names are concerned). I didn’t know if you’re coming from PHP and are just accustomed or were aware.

    Thought I’d make my comment an answer.

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