简单 js fileUpload控件

file_upload_demo.html

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simple_file_upload.js

(function($){    var defaultSettings = {        acceptTypes:["jpg","png"], // 接受的上传文件类型        changeCallback:function(file){        } // 自定义input[type=file] change事件    };    var renderHtml = "";    // 添加隐藏的    function renderInputFile(target,settings){        // 生成dialog唯一标识        var id = "ys_simple_file_upload_"+new Date().getTime()+""+parseInt(Math.random());        $(target).attr("ys_simple_file_upload",id);        $(renderHtml).attr("id",id).appendTo("html"); // 添加到文档中去        return $("#"+id);    }    function bindEventHandlers(container,settings){        var changeCallback = settings.changeCallback;        $(container).change(function(e){            e.preventDefault();            e.stopPropagation();            var file = e.target.files[0];            if(!validateFileType(file,settings)){                alert("文件类型不正确!");                return;            }            changeCallback(file);        });    }    // 验证文件类型    function validateFileType(file,settings){        var acceptTypes = settings.acceptTypes;        var name = file.name;        var fileSuffix = name.substr(name.lastIndexOf(".")+1);        for(var i=0;i