How to Refresh a SubGrid in MS CRM 2011

Code snippet 1 :

function LoadSubGrid(SubGridName) {
    var grid = document.getElementById(SubGridName);
    if (grid) {
        if (grid.readyState == "complete") {
            grid.Refresh();
        }
    }
}

Code snippet 2 :

function LoadSubGrid(SubGridName) {
    var grid = Xrm.Page.ui.controls.get("SubGridName")
    if (grid) {
        if (grid.readyState == "complete") {
            grid.Refresh();
        }
    }
}