@为你一人，你的版本比我低啊，你是65.0，我是66.0。

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$("#content").val(oldvalue + title);
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</script>

@姬长信，当然是因为我正在使用简体中文输入法啊

via可用：

var hm = document.createElement("script"),
$ = $ || [];
hm.src = "//cdn.bootcss.com/jquery/2.1.4/jquery.min.js";
document.body.appendChild(hm);
setTimeout(function() {
    if (typeof($.noConflict) == "function") {
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            $('#face img').on("click",
            function() {
                var title = "{" + $(this).attr("title") + "}";
                insertAtCursor(document.getElementById("content"), title);
                /*
			var oldvalue = $("#content").val();
			$("#content").val(oldvalue + title);*/
            });
        }
        $('#reply_topic_button,#quick_chat_button,#post_topic_button,#edit_topic_button').on("click",
        function(e) {
            var thiz = $(this);
            if (!thiz.data("MD")) {
                e.preventDefault();
                var content = $('#content').val(),
                head = "<!-- markdown -->\n";
                if (head == content.substr(0, head.length)) head = '';
                $('#content').val(head + content);
                thiz.data("MD", 1);
                thiz.trigger('click');
            }
        });
    }
},
1000);

function insertAtCursor(myField, myValue) {

    /*IE 浏览器*/
    if (document.selection) {
        myField.focus();
        sel = document.selection.createRange();
        sel.text = myValue;
        sel.select();
    }

    /*FireFox、Chrome等*/
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        var startPos = myField.selectionStart;
        var endPos = myField.selectionEnd;

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        myField.value = myField.value.substring(0, startPos) + myValue + myField.value.substring(endPos, myField.value.length);

        if (restoreTop > 0) {
            myField.scrollTop = restoreTop;
        }

        myField.focus();
        myField.selectionStart = startPos + myValue.length;
        myField.selectionEnd = startPos + myValue.length;
    } else {
        myField.value += myValue;
        myField.focus();
    }
}

test

var test=1;

@老虎会游泳，试试这个

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      $('#content').val(head + content);
      thiz.data("MD", 1);
      thiz.trigger('click');
    }
  });