var numAttachments = 1;
var totalAmount = 0;
var tabAmount = 0;

function addAttachment()
{
	$('.attachment_0').clone().removeClass('attachment_0').addClass('attachment_' + numAttachments).insertBefore('.addattachment');
	$('.attachment_' + numAttachments + ' td input').attr('name', 'attachment[' + numAttachments + ']').val('');

	var buttonDelete = document.createElement('input');
	buttonDelete.type = 'button';
	buttonDelete.value = 'Delete';
	buttonDelete.className = 'btn';

	$('.attachment_' + numAttachments + ' td:last').append(document.createTextNode(' '))
	$('.attachment_' + numAttachments + ' td:last').append(document.createElement('strong'))
	$('.attachment_' + numAttachments + ' td:last strong').addClass('red').append(buttonDelete);
	$('.attachment_' + numAttachments + ' td input.btn').click(function(){
			$(this).parent().parent().parent().remove();
	});

	numAttachments++;
}

function changeHostingFlag()
{
	if (this.checked) {
		$('tr.hosting_from').show();
		$('tr.hosting_to').show();
	} else {
		$('tr.hosting_from').hide();
		$('tr.hosting_to').hide();
	}
}

function initForm(){
	$('tr.tabs td').tabs({idPrefix: 'invoice-tab' });
	$('tr.tabs input[name*="amount"]').blur(function(){
		recalcAll();
		recalcTab($(this).parent().parent().parent().parent().attr('id'));
	});
	$('tr.tabs input[type="checkbox"]').blur(function(){
		recalcAll();
		recalcTab($(this).parent().parent().parent().parent().attr('id'));
	}).click(function(){this.blur();});
	recalcTab('work_tab');
	recalcTab('domain_tab');
	recalcTab('hosting_tab');
	recalcTab('ssl_tab');
}

function recalcAll(){
	totalAmount = 0;
	$('tr.tabs input[name*="amount"]').each(function(){
		/*alert($(this).parent().prev().children('input[type="checkbox"]').size());*/
		if (!$(this).parent().prev().children('input[type="checkbox"]').size() || 
				$(this).parent().prev().children('input:checked').size()){
			amount = parseFloat($(this).val(),10);
			if (!isNaN(amount)) {
				totalAmount += amount;
			}
		}
	});
	$('tr.amount input').val(number_format(totalAmount, 2, '.', ''));
}

function recalcTab(tabId)
{
	tabAmount = 0;
	$('#' + tabId + ' tr').each(function(){
		if (!$(this).children('td:0').children('input[type="checkbox"]').size() ||
				$(this).children('td:0').children('input').attr('checked')) {
			amount = parseFloat($(this).children('td:1').children('input[name*="amount"]').val(),10);
			if (!isNaN(amount)) {
				tabAmount += amount;
			}
		}
	});
	$('tr.tabs a[href="#' + tabId + '"] span').html('$'+number_format(tabAmount, 2, '.', ''));
}