STRANGE problem: all of sudden my Javascript code is not working

Hello,

All of a sudden the Javascript in one of the pages is not working!
Looking at the Javaconsole I see the Error message:

Uncaught ReferenceError: helloworld is not defined advman_keyword_new.php:465
Uncaught ReferenceError: get_state_vals is not defined advman_keyword_new.php:600

But these Javascript functions are defined between the
<script language=“JavaScript”>
</script>

section of the page, for example as an example in there there is:

function helloworld()
{
alert (‘Hello World 3’);
}

which I added there just to show this strange Error.
What the HEK is going on!

ThanX,

URL?

I already got the answer to what was the problem from another JavaScript forum.
Thanks anyway.