Plugin creation

Hi.

I’m trying to create plugin witch will be adding some script using quicktag.
Is it possible to add javascript?

I’m trying to do something like this but when I add “myValue” content with <script> button is not showing

<script type=”text/javascript”>//<![CDATA[
var toolbar = document.getElementById(“ed_toolbar”);
<?php
edit_insert_button(“Flash”, “wp_slideshow_handler”, “Add slideshow”);
?>
var state_my_button = true

function wp_slideshow_handler() {
if (state_my_button) {
var myXML = prompt(‘add XML name’);
var myWidth = prompt(‘Width’);
var myHeight = prompt(‘Height’);
if (myXML && myWidth && myHeight) {
myValue = ‘<script src=”/slidshow/swfobject.js” type=”text/javascript”></script><p id=”flashcontent”>Here will be displayed Flash content</p><script type=”text/javascript”> var so = new SWFObject(“/slidshow/slideshow.swf”, “mss”, “‘+myWidth+'”, “‘+myHeight+'”, “8”, “#FFFFFF”); so.addVariable(“dataFile”, “/slidshow/’+myXML+’.xml”); so.write(“flashcontent”); </script>’;
edInsertContent(edCanvas, myValue);
}
}
}
//]]></script>
Any ideas?