.hiddencol {
    background-color: red;
    display: none;
}

.my-gridview
{
max-width:600px;
min-width:400px;
}

.GVFixedHeader {
    font-weight: bold;
    position: relative;
    top: expression(this.parentNode.parentNode.parentNode.scrollTop-1);
}

.GridViewContainer {
    overflow-y: scroll;
    overflow-x: hidden;
}

.test{
    background-color:red;
}