Put a javascript variable value into a concatenated string

Posted on 2009-05-19
Last Modified: 2012-05-07
I am creating a chart on the fly with xml/swf charts. The problem that I am having is that I am passing a querystring value so that it knows what xml file to pull the data into the chart.

I have setup my javascript to grab my only query string variable, and it does this correctly (tested that it's getting the value with document.write). The problem that I have is when I have added the value into the concatenated string (line that starts with "library") it doesn't pull the value.

What am I missing?

<script language="JavaScript" type="text/javascript">



        fullURL =

        qs = fullURL.substring(fullURL.indexOf('?') + 1, fullURL.length)

        userId = qs.substring(qs.indexOf('=') + 1, qs.length)



        if (AC_FL_RunContent == 0 || DetectFlashVer == 0) {

            alert("This page requires AC_RunActiveContent.js.");

        } else {

            var hasRightVersion = DetectFlashVer(requiredMajorVersion, requiredMinorVersion, requiredRevision);

            if (hasRightVersion) {


			'codebase', ',0,45,0',

			'width', '400',

			'height', '250',

			'scale', 'noscale',

			'salign', 'TL',

			'bgcolor', '#BE8407',

			'wmode', 'opaque',

			'movie', 'charts',

			'src', 'charts',


			'library_path=charts_library&xml_source=' + userId + '.xml',

			'id', 'my_chart',

			'name', 'my_chart',

			'menu', 'true',

			'allowFullScreen', 'true',

			'allowScriptAccess', 'sameDomain',

			'quality', 'high',

			'align', 'middle',

			'pluginspage', '',

			'play', 'true',

			'devicefont', 'false'


            } else {

                var alternateContent = 'This content requires the Adobe Flash Player. '

		+ '<u><a href=>Get Flash</a></u>.';




        // -->


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Question by:jrmcintosh
  • 4
  • 3
LVL 40

Expert Comment

Comment Utility
Can you add ...

alert('library_path=charts_library&xml_source=' + userId + '.xml');

after the line that populates the userID variable.


Author Comment

Comment Utility
What does that accomplish vs. what I have already tested with document.write.

Yes that gives me the correct URL value in the alert, but I need to place that userid below in the AC_FL_RunContent function.

Thanks for your help.
LVL 40

Expert Comment

Comment Utility
I want to make sure that the alert shows the correct value.

What I want to make sure it that there are no spaces or additional characters.

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Author Comment

Comment Utility
Yes, there are no spaces or additional characters.

When I view source the line in question doesn't give the userID value, it shows the code exactly as it is, like this:

'library_path=charts_library&xml_source=' + userId + '.xml',

but I want it to look like this based on the variable value:


Author Comment

Comment Utility
LVL 40

Expert Comment

Comment Utility
I assume ...


should be ...


Note the single quote before the ID.

The way I see this, the code is right.

I would now do some debugging in AC_FL_RunContent() to see what it is getting for param#20 (I assume the value associated with FlashVars).

LVL 40

Accepted Solution

RQuadling earned 500 total points
Comment Utility
You won't see a change in the source. The code is processed at runtime, so something like FireBug or just dumb alerts(); are needed to see what is going on.

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