Accesing Parent Window through Childwindow using Javascript

///////////////////////Accessing Id///////////////////////////
alert(window.opener.document.getElementById("HidString").value)

///////////////////////End Accessing Id///////////////////////////

///////////////////////Accessing Function///////////////////////////
child.aspx
window.opener.LoadEmp(obj)

parent.aspx
function LoadEmp(ob)
{
alert(ob);
}

///////////////////////End Accessing Function///////////////////////////


///////////////////////Refershing Parent Page from Child page////////////

Response.Write("<script language='javascript'>
window.opener.location.href=opener.location.href;</script>");