jquery实现在光标位置插入内容的方法

                            this.focus(); 
                            $t.selectionStart = startPos + myValue.length;
                            $t.selectionEnd = startPos + myValue.length; 
                            $t.scrollTop = scrollTop; 
                        } else { 
                            this.value += myValue; 
                            this.focus(); 
                        } 
                } 
            }) 
        })(jQuery); 
        $(document).ready(function () { 
            $(“#numd”).bind(“mouseleave”, function () { 
                document.getElementById(‘keybored’).style.display = ‘none’; 
                document.getElementById(‘Nm’).blur(); 
            }); 
            $(“#Nm”).focus(function () { 
                document.getElementById(‘keybored’).style.display = ”; 
            }); 
            $(“.readbtns”).click(function () { 
                $(“#Nm”).insertAtCaret($(this).val());