function ajaxLoad() {
        var ed = tinyMCE.get('elm1');
        // Do you ajax call here, window.setTimeout fakes ajax call
        ed.setProgressState(1); // Show progress
        window.setTimeout(function() {
            ed.setProgressState(0); // Hide progress
            ed.setContent('HTML Here');
        }, 500);
    }

function ajaxLoad() {
        var ed = tinyMCE.get('elm1');
        // Do you ajax call here, window.setTimeout fakes ajax call
        ed.setProgressState(1); // Show progress
        window.setTimeout(function() {
            ed.setProgressState(0); // Hide progress
            ed.setContent(<% ViewData["test"] %>);
        }, 500);
    }

ed.setContent(<%= ViewData["test"] %>); // the equals sign

<input type="hidden" id="myTestData" value='<%=ViewData["test"]%>' />

$("#myTestData").val();

$.post("/jQueryTests/jQueryAddMessageComment", { commentText: commentText }, function(newComment) {
            $("#divComments" + id.toString()).html(newComment);
        });

$.post("/Articles/jQueryDownVoteArticle", { id: id }, function(votes) { document.getElementById("ArticleVotes").innerHTML = votes; }, "json");

return PartialView("commentList", new FormViewModel { LastComment = commentText });

return Json(new FormViewModel { LastComment = commentText });