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我目前正在嘗試寫一點js。我的導航具有設置爲背景的漸變。 當我向下滾動一定數量時,我想讓背景在高度上從漸變變爲具有0.85不透明度(動畫)的平坦顏色。jquery更改不透明度和滾動高度
,這裏是我的js代碼
$(window).scroll(function(){
if ($(window).scrollTop() >= 600){
$('#navigation').css({height: '92px'});
} else {
$('#navigation').css({height: '142px'});
}
});
這裏的CSS
#navigation {
height: 142px;
width: 1350px;
position: fixed;
z-index: 2000;
background: -moz-linear-gradient(top, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0) 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(0,0,0,0.75)), color-stop(100%,rgba(0,0,0,0))); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, rgba(0,0,0,0.75) 0%,rgba(0,0,0,0) 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, rgba(0,0,0,0.75) 0%,rgba(0,0,0,0) 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, rgba(0,0,0,0.75) 0%,rgba(0,0,0,0) 100%); /* IE10+ */
background: linear-gradient(to bottom, rgba(0,0,0,0.75) 0%,rgba(0,0,0,0) 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#bf000000', endColorstr='#00000000',GradientType=0); /* IE6-9 */
}
希望有人能幫助我
謝謝,這工作完美 – Jobes