//HTML
	<div id="rita">
        <img src="img/raposa_a_mexer/correr_1.png" id="raposa">
    </div>
    <div id="conteudo">
        <img src="http://3rdbillion.net/wp-content/uploads/2013/11/d6c7c50b9b49412a2ad9f847dcbaeeba13.jpg">
    </div>

//CSS
#rita {
    position: absolute;
    left: 0px;
    right: 0px;
    bottom: 0px;
    top: 0px;
    background: pink;
    z-index: 1000;
}

//JAVASCRIPT
document.getElementById("rita").style.display = "none";