Capturing JavaScript error in Selenium

Question

Is there a way to capture errors occurring in the DOM in Selenium and probably flag the same as an error in the page?

To give a brief exam

Answer 1

I would like to iterate on the answer of jhanifen. Here is a javascript solution that does not depend on jQuery. It creates an invisible HTML list on the bottom of the page, which contians the errors.

(function () {
    var ul = null;
    function createErrorList() {
        ul = document.createElement('ul');
        ul.setAttribute('id', 'js_error_list');
        ul.style.display = 'none';
        document.body.appendChild(ul);
    }
    window.onerror = function(msg){
        if (ul === null)
            createErrorList();
        var li = document.createElement("li");
        li.appendChild(document.createTextNode(msg));
        ul.appendChild(li);
    };
})();