if (/^\s*this.src\s*=\s*\'([^\']+)\';?\s*$/.test(dom.getAttrib(n, 'onmouseout')))
                nl.onmouseoutsrc.value = dom.getAttrib(n, 'onmouseout').replace(/^\s*this.src\s*=\s*\'([^\']+)\';?\s*$/, '$1');