var commonfunction = new Object ();

commonfunction.selectbox = new Object ();

commonfunction.selectbox.selectOptionWithValue = function ( selectObj, value )
{
  var options = selectObj.options;
  if ( options && options.length > 0 )
  {
    for ( var i = 0; i < options.length; i++ )
    {
      if ( options[i].value == value )
      {
        options[i].selected = true;
        break;
      }
    }
  }
}

commonfunction.selectbox.clearOptions = function ( selectObj )
{
  var options = selectObj.options;
  options.length = 0;
}