[DjDiablo]

нужен крохотный скрипт
этот скрипт добавляет класс mini

$(function(){

    $('.plashka').click(function(){
        $(this).toggleClass('mini');
    })

})

Рабочий пример

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
Кликни по блоку с текстом.

<div class="plashka">
                        	<h1>Download this app</h1>
                            <p>Visite our facebook
								Why? For the glory of SATANE of course!
								Workers everywhere should have the right to safe and ethical working conditions. They should also have access to educational oppor Visite our facebook
								Why? For the glory of SATANE of course!
								Workers everywhere should have the right to safe and ethical working conditions. They should also have access to educational oppor Visite our facebook
								Why? For the glory of SATANE of course!
								Workers everywhere should have the right to safe and ethical working conditions. They should also have access to educational oppor</p>
</div>


<script>
$(function(){
    $('.plashka').click(function(){
        $(this).toggleClass('mini');
    })
})
</script>

<style>
.plashka {
	width:440px;
	min-height:110px;
	border:1px #ebebeb solid;
	border-radius:10px; 
}

.mini {
	height:100px;
	overflow:hidden;
}

.plashka h1 {
    font-size:30px;
}
.plashka p {
    margin-top:20px;
}
</style>