Правильная прозрачность
Однажды мне понадобилось сделать прозрачные боковые поля для одного дизайна.
Я решил использовать прозрачность css.
Но каково было узнать, что все элементы внутри прозрачного блока тоже становятся прозрачны и это никак не изменить :-(, тогда мне пришлось использовать прозрачный png.
Недавно я наткнулся на замечательную технику позволяющую устранить эту проблему, ею я и хочу с вами любезно поделиться.
Техника заключается в подложке прозрачного блока в основной блок, который вы хотите сделать прозрачным.
Вот так выглядит наш блок:
<div id="container">
<h1>Привет, я прозрачный блок</h1>
Текст внутри блока. Текст внутри блока. Текст внутри блока.
</div>
Теперь добавим прозрачную подложку:
<div id="container">
<div class="transparency">
<!-- Это прозрачный блок-->
</div>
<div class="content">
<h1>Привет, я прозрачный блок</h1>
Текст внутри блока. Текст внутри блока. Текст внутри блока.
</div>
</div>
Теперь перейдем к оформлению css:
#container {
padding:20px;
width:300px;
color:#FFFFFF;
position:relative;
float:left;
margin-left:20px;
overflow:hidden;
}
#container .transparency {
opacity:0.5;
filter:alpha(opacity=50);
-moz-opacity:0.5;
background-color:#000000;
width:340px;
height:1500px;
position:absolute;
top:0px;
left:0px;
z-index:-1;
}
.content {
position:relative;
} Готово! Теперь все элементы внутри блока не изменят свою прозрачность. Для полного счастья, я решил написать небольшой скрипт на jQuery, который всё автоматизирует.
Вам будет достаточно лишь добавить класс transp к вашему блоку:
<div id="container" class="transp">
<h1>Привет, я прозрачный блок</h1>
Текст внутри блока. Текст внутри блока. Текст внутри блока.
</div>И конечно, сам jQuery код:
$(document).ready(function() {
$(".transp").wrapInner('<div>').children().addClass("content");
$(".transp .content").before('<div>').prev().addClass("transparency");
});На мастера jQuery я, конечно, не претендую, но это работает!
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