Asp - Accessing Javascript Variables

I want to assign array of photos to imagearray but the following script is not working. i cant able to access variables a,i,cnlink etc in new fadeSlideShow() .how to access this outside the function and assign it to imagearray

<script type="text/javascript">
var i; var a; var cnLink; var cn;var cnSplit;
var photos = new Array();
var photoslink = new Array();
function x() {
a = document.getElementById('HiddenField4').value;
cnLink = document.getElementById('hdnLink').value;
cn = document.getElementById('HiddenField3').value;
cnSplit = cnLink.split(';');
while (i < cn) {
photoslink[i] = cnSplit[i];
photos[i] = b[i];
i++;
}
}
var mygallery2 = new fadeSlideShow({
wrapperid: "fadeshow2",
dimensions: [568, 313],
imagearray: [
photos
//<--array of images!
],
displaymode: { type: 'auto', pause: 2500, cycles: 0, wraparound: false },
persist: false, //remember last viewed slide and recall within same session?
fadeduration: 500, //transition duration (milliseconds)
descreveal: "always",
togglerid: "fadeshow2toggler"
})
</script>