function calculate(str, inputs){
		var sum = 0;
		for(var i = 0; i < inputs.length; i++){
			if(inputs[i].className == str){
				sum += parseInt(inputs[i].value);
			}
		}
		return sum;
	}
	
	function calcTotal(obj){
		var inputs= document.getElementsByTagName('input');
		var str = obj.className;
		switch(str){
			case 'room_needs':						
						document.getElementById('rooms_total').value = calculate(str, inputs);
						break;
						
			case 'suite_needs':
						document.getElementById('suites_total').value = calculate(str, inputs);
						break;
						
			case 'staff_needs':
						document.getElementById('staff_total').value = calculate(str, inputs);
						break;
			default:
					break;
		}
	}