function number_format (number, decimals, dec_point, thousands_sep) {
	// http://kevin.vanzonneveld.net
	// +   original by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
	// +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// +     bugfix by: Michael White (http://getsprink.com)
	// +     bugfix by: Benjamin Lupton
	// +     bugfix by: Allan Jensen (http://www.winternet.no)
	// +    revised by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
	// +     bugfix by: Howard Yeend
	// +    revised by: Luke Smith (http://lucassmith.name)
	// +     bugfix by: Diogo Resende
	// +     bugfix by: Rival
	// +      input by: Kheang Hok Chin (http://www.distantia.ca/)
	// +   improved by: davook
	// +   improved by: Brett Zamir (http://brett-zamir.me)
	// +      input by: Jay Klehr
	// +   improved by: Brett Zamir (http://brett-zamir.me)
	// +      input by: Amir Habibi (http://www.residence-mixte.com/)
	// +     bugfix by: Brett Zamir (http://brett-zamir.me)
	// +   improved by: Theriault
	// +      input by: Amirouche
	// +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// *     example 1: number_format(1234.56);
	// *     returns 1: '1,235'
	// *     example 2: number_format(1234.56, 2, ',', ' ');
	// *     returns 2: '1 234,56'
	// *     example 3: number_format(1234.5678, 2, '.', '');
	// *     returns 3: '1234.57'
	// *     example 4: number_format(67, 2, ',', '.');
	// *     returns 4: '67,00'
	// *     example 5: number_format(1000);
	// *     returns 5: '1,000'
	// *     example 6: number_format(67.311, 2);
	// *     returns 6: '67.31'
	// *     example 7: number_format(1000.55, 1);
	// *     returns 7: '1,000.6'
	// *     example 8: number_format(67000, 5, ',', '.');
	// *     returns 8: '67.000,00000'
	// *     example 9: number_format(0.9, 0);
	// *     returns 9: '1'
	// *    example 10: number_format('1.20', 2);
	// *    returns 10: '1.20'
	// *    example 11: number_format('1.20', 4);
	// *    returns 11: '1.2000'
	// *    example 12: number_format('1.2000', 3);
	// *    returns 12: '1.200'
	// *    example 13: number_format('1 000,50', 2, '.', ' ');
	// *    returns 13: '100 050.00'
	// Strip all characters but numerical ones.
	number = (number + '').replace(/[^0-9+\-Ee.]/g, '');
	var n = !isFinite(+number) ? 0 : +number,
	prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),
	sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
	dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
	s = '',
	toFixedFix = function (n, prec) {
		var k = Math.pow(10, prec);
		return '' + Math.round(n * k) / k;
	};
	// Fix for IE parseFloat(0.55).toFixed(0) = 0;
	s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.');
	if (s[0].length > 3) {
		s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep);
	}
	if ((s[1] || '').length < prec) {
		s[1] = s[1] || '';
		s[1] += new Array(prec - s[1].length + 1).join('0');
	}
	return s.join(dec);
}


function jumlahkan(nama_class, target_input, target_display) {
	var arr_total = getElementsByClassName(document, "input", nama_class);
	var target_input = document.getElementById(target_input);
	var target_display = document.getElementById(target_display);
	//target.value = arr_total.value;
	var total = 0;
	for (var i = 0; i < arr_total.length; i++) {
		nilai_t = arr_total[i].value;
		nilai_n = nilai_t.replace(/,/g,"");
		total += (nilai_n * 1);
	}
	target_input.value = total;
	target_display.value = total;
	angka(target_display);
	if(total > 0) {
		group_total = document.getElementById(nama_class);
		group_total.style.display = 'none';
	} else {
		group_total = document.getElementById(nama_class);
		group_total.style.display = '';
	}
	
}