AspxGridView Client Side Events and Client Side Properties

1. How to check the column name exist in the aspxgridview client side
============================================
function GetColumn(s, e) 
{ 
      var MsgIDcolumn = s.GetColumnByField( "MsgID");           
       if (!!MsgIDcolumn) 
      {   
           return MsgIDcolumn;      
      }
}

2. How to get column values from the aspxgridview in client side
==========================================

function ShowValues(s, e) {
    s.GetRowValues(e.visibleIndex, 'ReletedWithChildId;ID',DisplayValues);
}

function DisplayValues(RelatedWithIDData)
{
    alert("ReletedWithChildId:" + RelatedWithIDData[0]);  alert("ID:" + RelatedWithIDData[1]);
}