Create a code with three level of execution context in JavaScript
Description
The following code shows how to create a code with three level of execution context.
Example
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
var name = "JavaScript";
function changeName(){<!--from w ww . j a va2 s. co m-->
var anotherName = "HTML";
function swapNames(){
var tempName = anotherName;
document.writeln("tempName:"+tempName);
anotherName = name;
name = tempName;
//name, anotherName, and tempName
//are all accessible here
}
//name and anotherName are accessible here,
//but not tempName
swapNames();
}
//only name is accessible here
changeName();
document.writeln(name);//HTML
</script>
</head>
<body>
</body>
</html>
The code above generates the following result.
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Demonstrate that variable defined without v...
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Use eval to evaluate dynamic expressions in...
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