И вообще исключить ее применение везде, и html, и в css
$('<div class="someclass">')
<div class="parralax" data-type="background" data-speed="10"></div>
body{
margin:0;
}
.parralax{
position:relative;
min-height:1500px;
background:url(...) 100% 0 / cover no-repeat fixed;
}
$(function(){
var $blocks = $('div[data-type="background"]');
$(window).scroll(function() {
var scrollTop = - $(this).scrollTop();
$blocks.each(function(){
var $block = $(this),
bposition = $block.css('backgroundPosition').split(/\s+/);
$block.css({
backgroundPosition: bposition[0] + ' ' + scrollTop / $block.data('speed') + 'px'
});
});
});
});
var popup = $('#popup');
function openPopup() {
...
$(document)
.on('keydown', closePopup)
.on('click', closePopup);
}
function closePopup() {
popup.closePopup();
$(document)
.off('keydown', closePopup)
.off('click', closePopup);
}
<select multiple>
<option value="1">Alpha</option>
<option value="2">Beta</option>
<option value="3">Gamma</option>
</select>