function isValid() {
    var txtBox1 = document.getElementById("ctl00_ContentPlaceHolderBody_Brand_i");
    var txtBox2 = document.getElementById("ctl00_ContentPlaceHolderBody_Product_i");
    var ret = (txtBox1.value != "" || txtBox2.value != "")
    if (!ret) alert('Enter either a Brand Name, a Product Description, or both.');
    return (ret);
}