So you need a breadcrumbs script? Why not ServerSideGuy.com ?
December 9, 2012
        
        We recently had a breadcrumb script request and I thought I’d share what we decided to do. We will do this in javascript so that it is not bound to a specific server.
This is for more basic site layouts and revolved around splicing the window.location.pathname variable.
Requirements:
- You will need jQuery plugged into your site.
 - ^ That’s about it.
 
So first make an empty div that you want to hold the breadcrumbs in and give it an id of breadcrumbs.
Then use this script:
function breadcrumbs()
{
        var gretel = "";
	var href = window.location.pathname;
	var hansel = href.split("/");
	for (var i=2;i<(hansel.length-1);i++) {
	gretel+=""+hansel[i]+" » ";
	}
	i=hansel.length-1;
	gretel+=""+hansel[i]+"";
	var url =  gretel;
        $("#breadcrumbs").html(url);
}
The result will look something like this: Home » Hansel » Gretel
This is a simple solution for parsing out your URL into breadcrumbs.