/***********************************
 * Yannick Martin
 *
 * 22 oct 2009
 *
 * gestion formulaire prepaiement
 *
 **********************************/


function enableTvaNum(bool)
{
  document.enablTvaNum = bool ;
  refreshForm() ;
}

function askTvaNum(bool)
{
  document.askTva = bool ;
  refreshForm() ;
}


function refreshForm()
{
  if (isset(document.enablTvaNum) && isset(document.askTva))
  {
    if (document.enablTvaNum && document.askTva)
      printTrById("customerTvaNum") ;
    else
      hideTrById("customerTvaNum") ;
  }
}


/**************************************************************/

function isset(variable)
{
  return (typeof(variable) == "undefined") ? false : true ;
}

function printTrById(name)
{
  document.getElementById(name).style.display = "table-row" ;
}

function hideTrById(name)
{
  document.getElementById(name).style.display = "none" ;
}