未捕获类型错误:children[i]。子项不是函数[重复]

每个li元素都有三个复选框,分别是object\u ck\u bx、write\u ck\u bx、view\u ck\u bx,我需要获取该复选框的值,但我得到“children不是函数”,为什么代码可以访问li标记名,但不能访问li children?

 function getTreeData() {
        // Get All Li elements thats contains the checkboxes form the type object,read,write
        var children = $('#my_dynamic_list').children().find('li[name=children-li]');
        var extracted_data = [];
        for (i = 0; i < children.length ; i++) {
            alert(children[i].tagName); //this gives li

            if (children[i].children().find('input[name=object_ck_bx]').checked == true) { // This Line gives Uncaught TypeError: children[i].children is not a function
                var profile_code = children[i].children().find('input[name=object_ck_bx]').id;
                var view = children[i].children().find('input[name=view_ck_bx]').checked;
                var write = children[i].children().find('input[name=write_ck_bx]').checked;
                alert('profile_code' + profile_code);
                var item = [];
                item = { Id: profile_code, read: view, write: write };
                extracted_data.push(item);
            }

        }
      //  alert(extracted_data);
        return extracted_data;
    }

Html代码:

浏览器中的li属性如下所示