#invoke это id ша размету покажу
<!doctype html>
<html lang="ru">
<head>
<script type="text/javascript" src="js/jquery-2.1.3.min.js"></script>
<script type="text/javascript" src="js/cast.js"></script>
<script type="text/javascript" src="js/shporgalka.js"></script>
<link href="cast.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<div class="invoker">
</div>
<div class="qwe">
<div id="quasactiv">
<a href="#"></a>
</div>
<div id="wexactiv">
<a href="#"></a>
</div>
<div id="exortactiv">
<a href="#"></a>
</div>
</div>
<div class="content">
<p><a href="#" class="shtorka">подсказка</a></p>
</div>
<div class="platforma">
</div>
<div class="shpargalka">
</div>
<div class="cast">
<div id="quas">
<input id="btn-quas" type="submit" value="Q">
</div>
<div id="wex">
<input id="btn-wex" type="submit" value="W">
</div>
<div id="exort">
<input id="btn-exort" type="submit" value="E">
</div>
<div id="invoke">
<input id="btn-invoke" type="submit" value="R">
</div>
</div>
<div class="platforma2">
</div>
</html>