Heres a version that will work in old and new browsers by seeing if querySelectorAll is supported

You can use it by calling getElementsByAttribute(attribute, value)

Here is a fiddle: http://jsfiddle.net/ghRqV/

var getElementsByAttribute = function(attr, value) {

    if ('querySelectorAll' in document) {

        return document.querySelectorAll( [+attr+=+value+] )   

    } else {

        var els = document.getElementsByTagName(*),

            result = []



        for (var i=0, _len=els.length; i < _len; i++) {

            var el = els[i]



            if (el.hasAttribute(attr)) {

                if (el.getAttribute(attr) === value) result.push(el)

            }

        }



        return result

    }

}