ASP.NET

 <form id="form1" runat="server">
    <div>
    <asp:FileUpload ID="FileUpload1" runat="server" />
        <br />
        <br />
    <a href="#" id="btnImg" onclick="uploadImg()" runat="server">UPLOAD</a>
    </div>
    </form>

<script>
    function uploadImg(){
        var formData = new FormData();
        formData.append('FileUpload1', $("input[type=file]")[0].files[0]);
        $.ajax({
            type: "POST",
            url: 'Default.aspx/imageUpload',
            data: formData,
            contentType: 'application/json; charset=utf-8',
            success: function (data) {
                alert(data);
            }
        });

    }
</script>

protected void Page_Load(object sender, EventArgs e)
{

}

[WebMethod]
protected void imageUpload(object sender, EventArgs e)
{
    if (FileUpload1.HasFile)
    {
        string fileName = Path.GetFileName(FileUpload1.PostedFile.FileName);
        Guid _fileNameRandom = Guid.NewGuid();
        string _fileNameStr = _fileNameRandom.ToString();
        FileUpload1.PostedFile.SaveAs(Server.MapPath("/Images/") + (_fileNameStr + fileName));
        Response.Redirect(Request.Url.AbsoluteUri);
    }
}

Quote:

Uncaught TypeError: Illegal invocation
at e (jquery.min.js:4)
at xb (jquery.min.js:4)
at Function.r.param (jquery.min.js:4)
at Function.ajax (jquery.min.js:4)
at uploadImg (Default.aspx:33)
at HTMLAnchorElement.onclick (Default.aspx:21)

Dim PlainMessage As AlternateView = AlternateView.CreateAlternateViewFromString("Hello. To reset your password....Nothing, "text/plain")
Dim mimeType As ContentType = New ContentType("text/html")
Dim HtmlMessage As AlternateView = AlternateView.CreateAlternateViewFromString("<p style......Nothing, "text/html")
Dim Logo As New LinkedResource(Server.MapPath("~/Images/emailBG.jpg"), "image/jpeg") 'embedded image
Logo.ContentId = "emailBG"

myMessage.AlternateViews.Add(PlainMessage)
myMessage.AlternateViews.Add(HtmlMessage)</<pre lang="HTML">