首先必用 JQuery.fn.extend方法 使用方法：jQuery.fn.extend({});其次 相应控件配置参数设置：jQuery.fn.extend({    uploadPreview: function (opts) {        opts = jQuery.extend({            Img: "ImgPr",            Width: 100,            Height: 100,            ImgType: ["gif", "jpeg", "jpg", "bmp", "png"],            Callback: function () { }        }, opts || {});});设置控件方法：var _self = this;var _this = $(this);_this.change(function () {});控件赋予事件： $("#id").uploadPreview({ Img: "ImgPr", Width: 120, Height: 120, ImgType: ["gif", "jpeg", "jpg", "bmp", "png"], Callback: function () { }});