function SetChildrenDetailsVisibility (ControlSelect, Div1_name, Div2_name) {
 	 	var SelectedValue = ControlSelect.options[ControlSelect.selectedIndex].value;
 	 	var Div1 = document.getElementById (Div1_name);
 
 	 	var Div2 = false;
 	 	if (Div2_name != null) Div2 = document.getElementById (Div2_name);
 	 	
 	 	if ( (SelectedValue >= 4 ) && (SelectedValue < 5) ){
 	 		SwitchOnDiv (Div1);
 	 		if (Div2) SwitchOffDiv (Div2);
 	 	} else if (SelectedValue >= 5) {
 	 		SwitchOnDiv (Div1);
 	 		if (Div2) SwitchOnDiv (Div2);
 	 	} else {
 	 		SwitchOffDiv (Div1);
 	 		if (Div2) SwitchOffDiv (Div2);
 	 	}
 	
 }
 
 function SwitchOnDiv (Div) {
 	Div.style.visibility = 'visible';
 	Div.style.display = 'block';
 }
 
  function SwitchOffDiv (Div) {
 	Div.style.visibility = 'hidden';
 	Div.style.display = 'none';
 }