GridView移动行变色

1.

        protected void myGridView_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            //if (e.Row.RowType == DataControlRowType.Header)
            //{
            //    e.Row.Attributes.Add("style", "background-image:url('./HeadImages/headeImage.jpg')");
            //}
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                //e.Row.Attributes["onmouseover"] = "ItemOver(this)";
                e.Row.Attributes.Add("onmouseover", "e=this.style.backgroundColor; this.style.backgroundColor='#EEEEEE'");
                e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=e");
            }
        }

2.

e.Row.Attributes["onmouseover"] = "ItemOver(this)";

if (!objbeforeItem)
{
    var objbeforeItem=null;
    var objbeforeItembackgroundColor=null;
}    
function ItemOver(obj)
{
    if(objbeforeItem)
    {
        objbeforeItem.style.backgroundColor = objbeforeItembackgroundColor;
    }
    objbeforeItembackgroundColor = obj.style.backgroundColor;
    objbeforeItem = obj;
    obj.style.backgroundColor = "#B9D1F3";     
}