/*
The prupsoe of these methoeds is to 
show the following Dropdowns when subject = tickets. 
	Number of Adult tickets                             numberOfAdultTickets_row
	Number of Child tickets                              numberOfChildrenTickets_row
show the following Dropdowns when subject = Dvds. 
	Number of standard dvds                          numberOfStandardDvds_row
	//Number of special edition DVDs                numberOfSpecialDvds_row -- No longer required
	Title			                                  nameOfDvd_row
 they are hiden in all other situations. I
 if the page is reloaded, they remain hiden- i don't give a damn about their previous state!!!!!


 */
function initialise(){
	//called onLoad
	
	//hide both sets of drop downs
whatDropdownsShallIShowOrHide(document.getElementById('subject'));
}


function whatDropdownsShallIShowOrHide(subjectDropDown){
	//called onchange
	
	//i'm not 100% how to get the value from a dropdown!!!!!!!!!!!!!!!!!!!
	var selectedSubjectIndex= subjectDropDown.selectedIndex;
	var userChoice = subjectDropDown.options[selectedSubjectIndex];
	
	if(userChoice.value == "Tickets"){
		showTickets();
		hideDvds();
		
	}else if (userChoice.value == "DVDs"){
		showDvds();
		hideTickets();
	}else{
		hideTickets();
		hideDvds();
	}		
}


function showDvds(){
	/* No longer required
	var numberOfSpecialDvds = document.getElementById('numberOfSpecialDvds_row');
	numberOfSpecialDvds.style.display="table-row";		//show
	*/
		
		var nameDvds = document.getElementById('nameOfDvd_row');
		nameDvds.style.display="table-row";		//show
		
		var numberOfStandardDvds = document.getElementById('numberOfStandardDvds_row');
		numberOfStandardDvds.style.display="table-row";		//show
		
}


function hideDvds(){

/* No longer required
	var numberOfSpecialDvds = document.getElementById('numberOfSpecialDvds_row');
		numberOfSpecialDvds.style.display="none";		//hide!
	*/	
	var nameDvds = document.getElementById('nameOfDvd_row');
		nameDvds.style.display="none";		//hide
		
	var numberOfStandardDvds = document.getElementById('numberOfStandardDvds_row');
		numberOfStandardDvds.style.display="none";		//hide
//copy and paste for numberOfStandardDvds_row nameOfDvd_row		
}

function showTickets(){

	var numberOfAdultTickets = document.getElementById('numberOfAdultTickets_row');
	numberOfAdultTickets.style.display="table-row";		//show
	
	
		var numberOfChildTickets = document.getElementById('numberOfChildrenTickets_row');
	numberOfChildTickets.style.display="table-row";		//show
	
	//copy and paste for numberOfChildrenTickets_row
}


function hideTickets(){
	var numberOfAdultTickets = document.getElementById('numberOfAdultTickets_row');
	numberOfAdultTickets.style.display="none";		//hide
	
			var numberOfChildTickets = document.getElementById('numberOfChildrenTickets_row');
	numberOfChildTickets.style.display="none";	//hide
}