function imgOn(imgElement, imgName)
{
    imgElement.src = imgName + "_selected.jpg";
}

function imgOff(imgElement, imgName)
{
    imgElement.src = imgName + ".jpg";
}

function getQueryStringValue(qName) {
    
    var allQueryStrings = window.location.search.substring(1);
    var qStrings = allQueryStrings.split("&");

    for (i = 0; i < qStrings.length; i++) {
        var qKeyValue = qStrings[i].split("=");
        if (qKeyValue[0] == qName) {
            return qKeyValue[1];
        }
    }
}