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Replace a string in <script> tags and execute

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Jul 16.2011

Hi,
I need a bit help, in the code below I an trying to replace a string with another string, then write the new string in JavaScript tags. But the result is not what I wanted: first the original string was not replaced, second plain text is shown, instead of popping up an alert. Is there a way I can replace the string and execute the command?
Any help is appreciated!

[CODE]<html>
<body>

<script type=”text/javascript”>

var str=”alert(“sometext”)”;

str.replace(“alert(“sometext”)”,”alert(“some new text”);” );

</script>

<script type=”text/javascript”>
document.write(str);
</script>
</body>
</html>
[/CODE]

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JavaScript

1 Comments(s) ↴

Copy linkTweet thisAlerts:
@mrhooJul 16.2011 — First, you need to set str=str.replace(whatever);

and second, a string is not executable code.

<!doctype html>

<html lang="en">

<head>

<title>Test Page</title>

</head>

<body>

<script>

var str="alert('sometext')";

str= str.replace("alert('sometext')","alert('some new text');" );

</script>

<script type="text/javascript">

eval(str);

</script>

</body>

</html>
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