问无法在ui中打开图像文件-对话框- IE 11中的问题

EN

<script type="text/javascript">
    function Downloadfile(x) {
        var jquery = $;
        var empCode = $("#EmpCode").val();
        var fileName = $(x).closest("tr").find('td:eq(0)').text();
        var actualfileName = $(x).closest("tr").find('td:eq(1)').text();

        var validExtensions = ["jpg", "jpeg", "gif", "png"];
        var file = fileName.split('.').pop();
        jquery("#dialog").dialog({
            modal: true,
            title: actualfileName,
            width: 950,
            height: 550,
            open: function () {
                jquery('.ui-dialog').css('z-index', 2000); jquery('.ui-widget-overlay').css('z-index', 1500);
                jquery('.ui-dialog-titlebar').css({ "background": "white", "border": "none", "text-align": "left", "font-size": "normal" });
                jquery('span').css({ "text-align": "left", "font-size": "normal" });
                var object = "<object data=\"http://mysitename.com/filepath/{FileName}\" type=\"application/pdf\" width=\"900px\" height=\"500px\">";
                object += "If you are unable to view file, you can download from <a href = \"http://mysitename.com/filepath/{FileName}\">here</a>";
                object += " or download <a target = \"_blank\" href = \"http://get.adobe.com/reader/\">Adobe PDF Reader</a> to view the file.";
                object += "</object>";
                object = object.replace(/{FileName}/g, "/" + fileName);
                
                //For image files
                var image = "<img src=\"http://mysitename.com/filepath/{FileName}\" width=\"900px\" height=\"500px\">"; 
                image = image.replace(/{FileName}/g, "/" + fileName);

                if (validExtensions.indexOf(file) != -1) {
                    jquery("#dialog").html(image);
                } else {
                    jquery("#dialog").html(object);
                }
            }
        });
    }
</script>