You cannot change the button image for this plugin. I would suggest download the lastest version of jQuery TinyMCE and then configure spellchecker
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>TinyMCE ASP.Net Example</title>
<!-- Load jQuery -->
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load("jquery", "1.6");
</script>
<!-- Load jQuery build -->
<script type="text/javascript" src="jscripts/tiny_mce/jquery.tinymce.js"></script>
<script type="text/javascript">
$(function () {
$('textarea').tinymce({
// Location of TinyMCE script
script_url: 'jscripts/tiny_mce/tiny_mce.js',
// General options
theme: "advanced",
plugins: "spellchecker,pagebreak,style,layer,table,save,advhr,advimage,advlink,emotions,iespell,inlinepopups,insertdatetime,preview,media,searchreplace,print,contextmenu,paste,directionality,fullscreen,noneditable,visualchars,nonbreaking,xhtmlxtras,template",
// Theme options
theme_advanced_buttons1: "save,newdocument,|,bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,styleselect,formatselect,fontselect,fontsizeselect,spellchecker",
theme_advanced_buttons2: "",
theme_advanced_buttons3: "",
theme_advanced_buttons4: "",
theme_advanced_toolbar_location: "top",
theme_advanced_toolbar_align: "left",
theme_advanced_statusbar_location: "bottom",
theme_advanced_resizing: true,
// Example content CSS (should be your site CSS)
content_css: "css/content.css",
// Drop lists for link/image/media/template dialogs
template_external_list_url: "lists/template_list.js",
external_link_list_url: "lists/link_list.js",
external_image_list_url: "lists/image_list.js",
media_external_list_url: "lists/media_list.js",
skin: "o2k7",
skin_variant: "silver",
// Replace values for the template plugin
template_replace_values: {
username: "Some User",
staffid: "991234"
},
spellchecker_languages: "English=en",
spellchecker_rpc_url: '<%=ResolveUrl("~/TinyMCE.ashx?module=SpellChecker") %>'
});
});
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:TextBox ID="RichTextBox" CssClass = "tiny" runat="server" TextMode = "MultiLine" ></asp:TextBox>
</form>
</body>
</html>
