How to change a variable by clicking a link?

[Origamidave]

I have a website with java script that references a gallery ID as a text string. I want to have the user click a link and change that gallery ID so they see a different gallery. Here's a snippet of the code:

/********************************************************
 * Fullscreen Slideshow JS
 *
 * By: FastLine Media - http://www.fastlinemedia.com
 *******************************************************/
  
YE.onDOMReady(function()
{
	if(YD.hasClass(document.body, "homepage") && YD.hasClass(document.body, "notLoggedIn")) {
	
		var hideOn = [
			'mycustompage',
			'galleries',
			'map',
			'featured',
			'recent',
			'featured-events',
			'find',
			'mysearch'
		];
		
		for(var i = 0; i < hideOn.length; i++) {
			if(YD.hasClass(document.body, hideOn[i])) {
				return;
			}
		}
	
		var ss = new FL.widget.Slideshow({
			id:document.body,
			sourceType:'smugmug',
			source:{
				APIKey:'7w6kuU5Ee6KSgRRExf2KLgppdkez9JD2',
				gallery:'22116386_jrvL6b'
			},
			speed:5000,
			stretchy:true,
			useGrid:false,

The line that needs to be changed is 5th from the bottom: gallery:'22116386_jrvL6b'
Again, in my navigation bar at the top i'd like to click home and have the value be '22116386_jrvL6b' and then click portfolio and have the value change to '22234234_ghklrhwjfh'

Let me know if you need more code to answer the question.
Any help would be greatly appriciated,
-OD

[holyhttp]

It appears all variables in your Javascript code are initialize when the DomReady event is fired.
You need to break down that code for more flexibility. For instance you can create a function that takes the slideshow id as its argument.

function getSlideShow(galleryid){
return new FL.widget.Slideshow({
id:document.body,
sourceType:'smugmug',
source:{
APIKey:'7w6kuU5Ee6KSgRRExf2KLgppdkez9JD2',
gallery:galleryid
},
speed:5000,
stretchy:true,
useGrid:false,
..... //adtional parameters
);

}

Now you can set your variable ss with a call:

var ss=getSlideShow('22116386_jrvL6b');

Of course, we need to see more of your JavaScript code if you need further assistance.