function CheckSelection(oSrc, args) {
    var radoObjList = document.getElementsByName("ctl00$ContentPlaceHolder1$rblOptionText");
    var selectedCount;
    selectedCount = 0;
    for (var i = 0; i < radoObjList.length; i++) {
        if (radoObjList[i].type == "radio") {
            if (radoObjList[i].checked) {
                selectedCount++
                break;
            }
        }
    }
    if (selectedCount > 0) args.IsValid = true;
    else args.IsValid = false;
}