Get Rss feed location from current website

For example, to get the URL or title you do this:
var URL = unescape(location.href)
var Title = unescape(document.title)

How can i get the RSS feed location?

I assume i have to find this, and get it from that.
<link rel="alternate" type="application/rss+xml" title="RSS - Title" href="feeds/rss.xml" />

 

function locateFeed() {
    var els = document.getElementsByTagName('link');
    for(i=0;i<els.length;i++) {
        if(els[i].getAttribute('title').indexOf('RSS') > -1) {
            var feed = els[i].getAttribute('href');
        }
    }
    return feed;
}

Code (markup):

This script assumes that RSS is in the title attribute, I believe this is the best way to catch the right link element.

This one checks if the rel="alternate":

function locateFeed() {
    var els = document.getElementsByTagName('link');
    for(i=0;i<els.length;i++) {
        if(els[i].getAttribute('rel') == 'alternate') {
            var feed = els[i].getAttribute('href');
        }
    }
    return feed;
}

Code (markup):