JS表自动取值赋值

/*
         *
         * V1.0.0 表单自动取值、赋值插件
         * 表单类型：text radio select-one checkbox textarea
         * 注意项：
         * 1.表单必须设置name属性
         * 调用
         * 取值：formCore.getFormValues()
         * 赋值：formCore.setFormValues(json)
        */
        var formCore = (function() {
            var getCbxValues = function(name) {
                var values = '';
                var cks = document.getElementsByName(name);

                for (var i = 0; i < cks.length; i++) {
                    if (cks[i].checked) {
                        values += cks[i].value + ',';
                    }
                }

                if (values != '') {
                    values = values.substring(0, values.length - 1);
                }

                return values;
            };

            var checkFieldId = function(id) {
                var obj = document.getElementById(id);

                if (obj == null) {
                    alert("该区域ID对象不存在，请检查！");
                    return false;
                }

                return true;
            }

            /*
            * 表单值"和\需要转义 如\\ \"
            */
            var checkIptValue = function(v) {
                return v.replace(/\\/g, '\\\\').replace(/"/g, '\\"');
            }

            var isInArray = function(arr, value) {
                for (var i = 0; i < arr.length; i++) {
                    if (arr[i] == value) {
                        return true;
                    }
                }

                return false;
            }

            var setChecked = function(name, value) {
                var cks = document.getElementsByName(name);
                var arr = value.split(',');

                for (var i = 0; i < cks.length; i++) {
                    if (isInArray(arr, cks[i].value)) {
                        cks[i].checked = true;
                    }
                }
            }

            var getFormValues = function(fieldId) {
                var ipts = null;

                if (fieldId != undefined) {
                    if (checkFieldId(fieldId)) {
                        ipts = $("#" + fieldObj).find(":input");
                    } else {
                        return false;
                    }
                } else {
                    ipts = $(document.body).find(":input");
                }

                var json = '{';

                if (ipts.length > 0) {
                    var obj = null;
                    var oldCbxName = '',
                        objName,
                        objType;

                    for (var i = 0; i < ipts.length; i++) {
                        obj = ipts[i];
                        objName = obj.name;
                        objType = obj.type;

                        if (objType == "text" || objType == "textarea") {
                            json += '"' + objName + '":"' + checkIptValue($(obj).val()) + '",';
                        } else if (objType == "radio") {
                            if (obj.checked) {
                                json += '"' + objName + '":"' + $(obj).val() + '",';
                            }
                        } else if (objType == "select-one") {
                            json += '"' + objName + '":"' + $(obj).val() + '",';
                        } else if (objType == "checkbox") {
                            //相同类型checkbox只取一次
                            if (oldCbxName != objName) {
                                oldCbxName = objName;
                                json += '"' + objName + '":"' + getCbxValues(oldCbxName) + '",';
                            }
                        }
                    }

                    json = json.substring(0, json.length - 1);
                }

                json += '}';
                return json;
            };

            var setFormValues = function(json) {
                if (json != undefined && json != null) {
                    var obj = null,
                        sel = null,
                        objType = null;

                    for (var a in json) {
                        sel = ":input[name='" + a + "']";
                        obj = $(sel);
                        objType = obj[0].type;

                        if (objType == "text" || objType == "select-one" || objType == "textarea") {
                            obj.val(json[a]);
                        } else if (objType == "radio" || objType == "checkbox") {
                            setChecked(a, json[a]);
                        }
                    }
                }
            };

            return { getFormValues: getFormValues, setFormValues: setFormValues };
        })();