loop = function (els, container) {
                var i, len, el, href, cssUrl;

                for (i = 0, len = els.length; i < len; i += 1) {
                    el = els[i];
                    href = el.href || el.getAttribute('href');
                    if (href && (el.rel === 'stylesheet' ||
                            el.type === 'text/css')) {
                        comps.push({
                            type: 'css',
                            href: href === node.URL ? '' : href,
                            containerNode: container
                        });
                        cssUrl = YSLOW.util.makeAbsoluteUrl(href, baseHref);
                        comps = comps.concat(that.findImportedStyleSheets(el.sheet, cssUrl));
                    }
                }
            }
@private
Find all stylesheets in the passed DOM node.
@param {DOMElement} node DOM object
@param {String} doc_location document.location
@param {String} base_href base href
@return array of object (array[] = {'type' : 'css', 'href': object.href})
@type Array