Gridview column freeze not working in Mozilla

I am trying to freeze the first column of a gridview in asp.net. My css code is

.CellLocked {
background-color:Gray;
position:relative;
left:expression(this.parentNode.parentNode.parentNode.parentNode.parentNode.scrollLeft-1);
}

It is fine in IE but not working in mozilla. Plz help. Thanks...

Set this in your css:

position:absolute;