Global scope and page scope : Variable Definition « Language Basics « JavaScript DHTML






  1. JavaScript DHTML
  2. Language Basics
  3. Variable Definition

Global scope and page scope

   

<html>
<head>
<title>Scope</title>
<script type="text/javascript">
if (typeof(message) != 'undefined') 
  message += " globalPrint"; 

function globalPrint() {
  document.write(message);
}

</script>

<script type="text/javascript">
function global2Print() {
    message += " global2Print";
    document.write(message);
}
</script>

<script type="text/javascript">
message = "AAA";

function testScope() {
  message += " in testScope()";
  document.write(message);
}
</script>

</head>
<body onload="testScope();global2Print();globalPrint()">
<script type="text/javascript">

message += " embedded in page";
document.writeln(message);
</script>
</body>
</html>








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6.Variable scope
7.Variable scoping
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