我正在嘗試像這樣在我的JavaScript中添加所有卡路里含量：$(function() {    var data = [];    $( "#draggable1" ).draggable();    $( "#draggable2" ).draggable();    $( "#draggable3" ).draggable();    $("#droppable_box").droppable({        drop: function(event, ui) {            var currentId = $(ui.draggable).attr('id');            var total = 0;            data.push($(ui.draggable).attr('id'));            if(currentId == "draggable1"){            var myInt1 = parseFloat($('#MealplanCalsPerServing1').val());            }            if(currentId == "draggable2"){            var myInt2 = parseFloat($('#MealplanCalsPerServing2').val());            }            if(currentId == "draggable3"){            var myInt3 = parseFloat($('#MealplanCalsPerServing3').val());            }        if ( typeof myInt1 === 'undefined' || !myInt1 ) {        myInt1 = parseInt(0);        }        if ( typeof myInt2 === 'undefined' || !myInt2){        myInt2 = parseInt(0);        }        if ( typeof myInt3 === 'undefined' || !myInt3){        myInt3 = parseInt(0);        }        total = parseFloat(myInt1 + myInt2 + myInt3);        $('#response').append(total);        }    });    $('#myId').click(function(event) {        $.post("process.php", ({ id: data }), function(return_data, status) {            alert(data);            //alert(total);        });    });});無需添加變量，而是將它們串聯在一起。我試過使用parseInt，parseFloat和Number，但是我仍然只是串聯而不是加法。請在http://m