How to change the font of the Richtextbox of sharepoint library/list when it gets focus/ cursor on it.

How to change the font of the Richtextbox of sharepoint library/list when it gets focus/ cursor on it.

Open New Item page in edit mode.

Add content editor webpart to page at the end.

Add below script to content editor webpart. (Make sure that you change your control id in below code).

<script type="text/javascript" src="http://code.jquery.com/jquery.min.js">script>
<script type="text/javascript">
    $("div#ctl00CONTROL_NAME").focus(function () {
        alert("in");
        var e = jQuery.Event("keydown");
        e.which = 13;
        $("input[name='FontSizeStyleValue']").val("25pt").trigger(e);
        alert("End");
    });
    alert("Thanks for visiting!");
script>