getElementsByAttr

getElementsByAttr.js

function getElementsByAttr(attribute, value, parent) {
    var matchingElements = [],
        allElements = (parent || document).getElementsByTagName("*");

    for (var i = 0, n = allElements.length; i < n; i++) {
        if (allElements[i].getAttribute(attribute) === value) {
            // Element exists with attribute. Add to array.
            matchingElements.push(allElements[i]);
        }
    }

    return matchingElements;
}