var DEBUG = false;





function get_frm_ptr_by_name( frm_nm ) {


var frm = null;





  frm = document.forms[frm_nm];





  if( DEBUG && frm == null )


    alert("Error: form with name '" + frm_nm + "' not found.");





  return frm;


}





function get_frm_ctrl_ptr_by_name( frm, ctrl_nm ) {


var ctrl_ptr = frm.elements[ ctrl_nm ];





  if( ctrl_ptr == null && DEBUG )


    alert("Error: control with name '" + ctrl_nm + "' in form '" + frm.name + "' not found.");





  return ctrl_ptr;


}





function ccv( frm_nm, ctrl_nm ) {


var frm = null;


var ctrl = null;


  // form init


  frm = get_frm_ptr_by_name( frm_nm );


  if (frm==null) return;


  // control init


  ctrl = get_frm_ctrl_ptr_by_name( frm, ctrl_nm );


  if (ctrl==null) return;


  ctrl.value = '';


}