解决：swfupload在IE9中不显示上传按钮的问题

问题描述：

使用swfupload.js上传文件,在IE8、火狐、谷歌浏览器中显示正常，但是在IE9下不能显示上传按钮。

解决方法：

打开swfupload.js文件找到307行开始的如下代码：

// Private: getFlashHTML generates the object tag needed to embed the flash in to the document

SWFUpload.prototype.getFlashHTML = function (flashVersion) {

??? // Flash Satay object syntax: http://www.alistapart.com/articles/flashsatay

??? return ['<object id="',this.movieName,'" type="application/x-shockwave-flash" data="',(this.support.imageResize ? this.settings.flash_url : this.settings.flash9_url),'" width="', this.settings.button_width,'" height="',this.settings.button_height, '" class="swfupload">',

??????????????? '<param name="wmode" value="',this.settings.button_window_mode, '" />',

??????????????? '<param name="movie" value="','" />',

??????????????? '<param name="quality" value="high" />',

??????????????? '<param name="allowScriptAccess" value="always" />',

??????????????? '<param name="flashvars" value="' + this.getFlashVars() + '" />',

??????????????? '</object>'].join("");

};

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将其替换为：

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// Private: getFlashHTML generates the object tag needed to embed the flash in to the document

SWFUpload.prototype.getFlashHTML = function (flashVersion) {

??? // Flash Satay object syntax: http://www.alistapart.com/articles/flashsatay

?

?? ?//处理IE9中不显示上传按钮的情况

??? var classid = "";

??? var Sys = {};

??? var ua = navigator.userAgent.toLowerCase();

??? if (window.ActiveXObject)

??????? Sys.ie = ua.match(/msie ([d.]+)/)[1]

??? if (Sys.ie && Sys.ie.substring(0,1) == "9") {

??????? classid = ' classid = "clsid:d27cdb6e-ae6d-11cf-96b8-444553540000"';

??? }

??? return ['<object',classid,' id="',

??????????????? '</object>'].join("");

};

注：以上代码在IE7、IE8、IE9、火狐(Firefox 11.0)、谷歌（Google Chrome 17.0.963.83）浏览器中测试运行正常。