jQuery插件第五十二：无刷新批量上传文件

/*
* jQuery uploadbtn v0.3
* Copyright 2011, chinet_bridge
*/
//examples of call:$("#sclogo").uploadbtn3({ savepath: "~/UploadFile", callback: "setlogo" });
; (function($) {
   $.fn.uploadbtn = function(options) {
        var defaults = {
            /*自定义文件上传框上传成功后显示图片的函数callback，参数如下
            v:返回若干逗号分隔的图片名
            n:显示图片标签的id
            p:存储文件夹，比如~/UploadFile/SecuriCompany/
            w:图片宽度
            h:图片高度
            */
            callback: "",       //自定义文件上传框上传成功后显示图片的函数callback    ，这里写函数名称
            savepath: "",
            width: "100",
            height: "100",
            selector: "li",
            url: "ulb.aspx",
            //调用正式操作之前的函数
            callhook: function(n, p, w, h) {
                return "";
            }
        }
        //生成唯一数
        function newguid() {
            var guid = "";
            for (var i = 1; i <= 32; i++) {
                var n = Math.floor(Math.random() * 16.0).toString(16);
                guid += n;
                if ((i == 8) || (i == 12) || (i == 16) || (i == 20))
                    guid += "-";
            }
            return guid;
        }
        var opts = $.extend(defaults, options);
        return this.each(function() {
            var o = $.metadata ? $.extend({}, opts, $(this).metadata()) : opts;
            $(this).delegate(o.selector, "mouseenter", function() {
                var btn = $(this); 
                if (typeof btn.attr("id") == "undefined") {
                    btn.prop("id", newguid());
                }
                if (btn.prev().length > 0) { return true; }
                var h = "<div class=upp ><iframe src='{6}?callback={0}&element={5}&width={3}&height={4}&savepath={2}' width={3} height={4} scrolling='no' frameborder='0' allowtransparency='true' ></iframe>{1}</div>";
                h = h.replace("{6}", o["url"])
                .replace("{5}", btn.get(0).id)
                .replace("{0}", o["callback"])
                .replace("{1}", opts.callhook(btn.get(0).id, o["savepath"], o["width"], o["height"]))
                .replace("{2}", escape(o["savepath"]))
                .replace(/\{3\}/g, o["width"])
                .replace(/\{4\}/g, o["height"])
                ;
                btn.before(h);
            });
        });
    };
})(jQuery);