nav
Navigation satellite
index
index
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css nav-index property syntax
Function: nav-index attribute specifies the continuous navigation order ("tabbing order") of elements.
Syntax: nav-index: auto|number|inherit
Description: auto is controlled by the navigation key assigned by the browser to the element order. Number indicates the navigation key control order of the element. 1 represents the first one. inherit specifies that the value of the nav-index attribute should be inherited from the parent element.
Note: Currently only Opera supports the nav-index attribute.
css nav-index property example
<!DOCTYPE html>
<html>
<head>
<style>
button
{
position:absolute;
}
button#b1
{
top:20%;left:25%;
nav-index:1;
nav-right:#b2; nav-left:#b4;
nav-down:#b2; nav-up:#b4;
}
button#b2
{
top:40%;left:50%;
nav-index:2;
nav-right:#b3; nav-left:#b1;
nav-down:#b3; nav-up:#b1;
}
button#b3
{
top:70%;left:25%;
nav-index:3;
nav-right:#b4; nav-left:#b2;
nav-down:#b4; nav-up:#b2;
}
button#b4
{
top:40%;left:0%;
nav-index:4;
nav-right:#b1; nav-left:#b3;
nav-down:#b1; nav-up:#b3;
}
</style>
</head>
<body>
<button id="b1">Button 1</button>
<button id="b2">Button 2</button>
<button id="b3">Button 3</button>
<button id="b4">Button 4</button>
<p><b>注释：</b>目前只有 Opera 支持 nav-* 属性。当您使用方向键导航时，请同时按下 Shift 键。</p>
</body>
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