Javascript 如何动态更改CSS样式？

我有一个简单的元素：

如何仅动态更改

nav index

和

nav up

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

请注意，根据和，

nav index

和

nav up

仅由Opera支持

请注意，根据和，

nav index

和

nav up

仅由Opera支持。

如下：

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，建议将内联样式移动到css文件中的类

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

像这样：

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，建议将内联样式移动到css文件中的类

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

---

创建一个新的css并像这样调用它们

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.
}

---

创建一个新的css并像这样调用它们

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.
}

---

您可以使用jquery更改导航索引和导航向上

$('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.

---

您可以使用jquery更改导航索引和导航向上

$('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.

---

是否可以将这些内联样式移动到单独的样式表？是否可以将这些内联样式移动到单独的样式表？