問題描述：
使用swfupload.js上傳文件,在IE8、火狐、谷歌瀏覽器中顯示正常，但是在IE9下不能顯示上傳按鈕。
解決方法：
打開swfupload.js文件找到307行開始的如下代碼：
// 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="', (this.support.imageResize ?this.settings.flash_url : this.settings.flash9_url), '" />',
'<param name="quality" value="high" />',
'<param name="allowScriptAccess" value="always" />',
'<param name="flashvars" value="' + this.getFlashVars() + '" />',
'</object>'].join("");
};
將其替換爲：
// 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
//處理IE9中不顯示上傳按鈕的情況
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="', 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="', (this.support.imageResize ?this.settings.flash_url : this.settings.flash9_url), '" />',
'<param name="quality" value="high" />',
'<param name="allowScriptAccess" value="always" />',
'<param name="flashvars" value="' + this.getFlashVars() + '" />',
'</object>'].join("");
};
注：以上代碼在IE7、IE8、IE9、火狐(Firefox 11.0)、谷歌（Google Chrome 17.0.963.83）瀏覽器中測試運行正常。
說明：修改前後的屬性this.support.imageResize，不同的版本可能沒有該屬性。