function divexpandcollapse(divname) {

    var div = document.getElementById(divname);

    var img = document.getElementById('img' + divname);

    if (div.style.display == "none") {

        div.style.display = "inline";

        img.src = "../images/minus.gif";
    } else {

        div.style.display = "none";

        img.src = "../images/plus.gif";
    }

}

protected void OnClosetIndexChanged(object sender, EventArgs e)
    {
       //Call javascript to reopen gridview
    }