Stealth Ping Userscript

// ==UserScript==
// @name         Stealth ping
// @namespace    http://your.homepage/
// @version      0.1
// @description  enter something useful
// @author       You
// @match        https://chat.stackexchange.com/rooms/240/the-nineteenth-byte
// @grant        none
// ==/UserScript==

function withJQuery(f) {
    var script = document.createElement('script');
    script.type = 'text/javascript';
    script.textContent = '(' + f + ')(jQuery)';
    document.head.appendChild(script);
}
withJQuery(function($){
    function setSelectionRange(input, selectionStart, selectionEnd) {
        if (input.setSelectionRange) {
            input.focus();
            input.setSelectionRange(selectionStart, selectionEnd);
        }
        else if (input.createTextRange) {
            var range = input.createTextRange();
            range.collapse(true);
            range.moveEnd('character', selectionEnd);
            range.moveStart('character', selectionStart);
            range.select();
        }
    }

    function setCaretToPos (input, pos) {
        setSelectionRange(input, pos, pos);
    }
    var input = $('#input');
    input.keydown(function(e) {
        if (e.which == 81 && e.ctrlKey) {
            e.preventDefault();
            $(this).val($(this).val() + "[​](http://@)");
            setCaretToPos(this, $(this).val().length - 1);
        }
    });
});