function updateProPrice( ) {
  var strVarName;
  var tempvarName;
  var tempvarProPrice1Person1Lesson;
  tempvarName = "PROPRICE_1PERSON_1LESSON";
  
 
  // alert (" tempvarProPrice1Person1Lesson:" +  tempvarProPrice1Person1Lesson ); 
  // alert ("NBRPERSONS: " + document.DBFORM.NBRPERSONS.value);
  // alert ("NBRCONSECUTIVELESSONS: " + document.DBFORM.NBRLESSONS.value);
  strVarName = "PROPRICE_" + document.DBFORM.NBRPERSONS.value + "PERSON_" + document.DBFORM.NBRLESSONS.value + "LESSON"
 
 // alert ("PRICE 1 person 1 lesson:" + DBFORM.elements[strVarName].value );
 
 // alert (strVarName + ":" + DBFORM.elements[strVarName].value );
 
	
  document.getElementById("ProPrice").innerHTML = DBFORM.elements[strVarName].value;
  }