如何動態更改 CSS 樣式？

Question

我有簡單的元素：

<a id="a1" href="#" style="position:absolute; top:0; left:0; nav-index:1; nav-down:#b1; nav-right:#a3; nav-left:#a1; nav-up:#a1">A1</a>

如何僅動態更改nav-index和nav-up ？

Answer 1

document.getElementById('a1').style.navIndex = newIndex;
document.getElementById('a1').style.navUp = newValue;

請注意，根據this和this ， nav-index和nav-up僅受 Opera 支持。

Answer 2

像這樣：

var a1 = document.getElementById('a1');
a1.style['nav-index'] = /* somevalue */;
a1.style['nav-up']    = /* somevalue */;
// or (style properties with hypens must be converted
// to a camel case representation for use in 'dot notation')
a1.style.navIndex = /* somevalue */;
a1.style.navUp    = /* somevalue */;
// and to retrieve the original values:
a1.style['nav-index'] = '';
a1.style['nav-up']    = '';

此外，建議將內聯樣式移動到 css 文件中的類。

.a1nav {
 position:absolute;
 top:0;
 left:0;
 nav-index:1;
 nav-down:#b1;
 nav-right:#a3;
 nav-left:#a1;
 nav-up:#a1;
}

Answer 3

創建一個新的 css 並像這樣調用它們

function changeClass (elementID, newClass) {
    var element = document.getElementById(elementID);

    element.setAttribute("class", newClass); //For Most Browsers
    element.setAttribute("className", newClass); //For IE; harmless to other browsers.
}

Answer 4

您可以使用 jquery 更改導航索引和導航向上。

$('a#a1').attr('nav-index', '2'); //If you want to change it to 2.
$('a#a1').attr('nav-up', '#5'); //If you want to change it to #5.