Helper function to embed in your page to let WatiN execute a CSS-selector based search for a DOM element.

watin_search_helper.js

;WatinSearchHelper = function ($) {
    var earTagId = 1;

    var getElementId = function (cssSelector) {
        var resultId = "_no_element_";
        var el = $(cssSelector);
        if (el.length > 0) {
            var firstEl = el[0];
            if (firstEl.id == "") {
                // Give this element a contrived id so we can find it directly from the WatiN side:
                firstEl.id = "_watin_search_" + earTagId++;
            }
            resultId = firstEl.id;
        }
        return resultId;
    };

    return { getElementId: getElementId };
} (jQuery);