JavaScript之充实文档的内容

1、我们在平时的开发中会碰到一些缩略语如:XML,HTML,API等专业术语；为了能使用户,更好的了解术语的意思,我们通常会给<abbr></abbr>标签加一个title属性来放术语的全称,但是有些浏览器可能不会显示title属性，所以我们通过JS来动态的加载并显示缩略语和他的全称。代码如下：

js代码:

window.onload=displayAbbreviations;

//处理文档中的缩略语,用JS生成一个列表用来显示对应的缩略语的具体含义

//produce a list of Abbreviation by js to deal with the Abbreviation in the document

function displayAbbreviations() {

    if (!checkCompatibility()) return;   //检查兼容性

    var abbreviations = document.getElementsByTagName("abbr"); //提取所有的缩略词标签

    if (abbreviations.length < 1) return false;

    var defs = new Array();

    for (var i = 0; i < abbreviations.length; i++) {

        var key = abbreviations[i].firstChild.nodeValue;//标签的文本值当key

        var definition = abbreviations[i].getAttribute("title"); //标签的title属性值当value;

        defs[key] = definition;

    }

    //创建缩略词展示列表

    var dllist = document.createElement("dl");

    for (key in defs) {

        //创建缩略词标题

        var dt=document.createElement("dt");

        var tit = document.createTextNode(key);

        dt.appendChild(tit);

        //创建描述

        var dd = document.createElement("dd");

        var descri = document.createTextNode(defs[key]);

        dd.appendChild(descri);

        dllist.appendChild(dt);

        dllist.appendChild(dd);

    }

    document.getElementsByTagName("body")[0].appendChild(dllist);

}

/*

检查浏览器的兼容性,是否支持查用的DOM方法

check the compatibility of the broswer

*/

function checkCompatibility() {

    if (!document.getElementById) return false;

    if (!document.createElement) return false;

    if (!document.createTextNode) return false;

    if (!document.getElementsByTagName) return false;

    if (!document.getElementsByName) return false;

    return true;

}

html:

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

    <title></title>

    <script src="js/index.js" type="text/javascript"></script>

</head>

<body>

<h1>What is the Document Object Model?</h1>

<p>The <abbr title="World Wide Web Consortium(联合)">W3C</abbr> defines the <abbr title="Document Object Model">DOM</abbr> as:</p>

<blockquote cite="http://www.w3.org/DOM/" title="W3C">

   <p>

   A platform- and language-neutral(中立语言) interface that will allows paograms and scripts to dynamically access and update the

   content,structrue and the style of documents.

   </p>

</blockquote>

<p>

It is an <abbr title="Application Programming Interface">API</abbr> that can be used to navigate(驾驶,操控) <abbr title="HyperText MarkUp Language">HTML</abbr>

and <abbr title="eXtensible MarkUp Language">XML</abbr>

</p>

<h1>Abbreviation(缩略语列表)</h1>

</body>

</html>

效果如图:

我们在写博客和文章的经常引用别人的文章,这个时候我们会说明这段文档的出处，我们在开发时亦是如此:这个时候我们可以给我们引用的段落用一个<blockquote></blockquote>包围,然后在里面加一个cite属性(文章出处的链接地址)标明出处,然后通过JS将地址动态的加载到引用段落的最后位置。代码如下:

js代码:

/*

检查浏览器的兼容性,是否支持查用的DOM方法

check the compatibility of the broswer

*/

function checkCompatibility() {

    if (!document.getElementById) return false;

    if (!document.createElement) return false;

    if (!document.createTextNode) return false;

    if (!document.getElementsByTagName) return false;

    if (!document.getElementsByName) return false;

    return true;

}

//文献来源链接表     在引用的文档的末尾添加引用的具体地址

//The literature source list      function:add  specific adress to end of the  reference document

function getLiteratureSourceList() {

    if (!checkCompatibility()) return;   //检查兼容性

    if (!document.getElementsByTagName("blockquote")) return false;

    var quotes =document.getElementsByTagName("blockquote");

    for (var i = 0; i < quotes.length; i++) {

        var cite = quotes[i].getAttribute("cite") != "" ? quotes[i].getAttribute("cite") : "javascript:void(0)"; //get reallink

        var from = quotes[i].getAttribute("title") == "" ? "" : "from   "+quotes[i].getAttribute("title");  //get the origin of the document

        var link = document.createElement("a");

        link.setAttribute("href", cite); //set href to a

        var txt = document.createTextNode(from);

        link.appendChild(txt);

        quotes[i].appendChild(link);

    }

}

//The literature source list end

html代码如下:

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

    <title></title>

    <script src="js/utility.js" type="text/javascript"></script>

    <script src="js/index.js" type="text/javascript"></script>

</head>

<body>

<h1>What is the Document Object Model?</h1>

<p>The <abbr title="World Wide Web Consortium(联合)">W3C</abbr> defines the <abbr title="Document Object Model">DOM</abbr> as:</p>

<blockquote cite="http://www.w3.org/DOM/" title="W3C">

   <p>

   A platform- and language-neutral(中立语言) interface that will allows paograms and scripts to dynamically access and update the

   content,structrue and the style of documents.

   </p>

</blockquote>

<p>

It is an <abbr title="Application Programming Interface">API</abbr> that can be used to navigate(驾驶,操控) <abbr title="HyperText MarkUp Language">HTML</abbr>

and <abbr title="eXtensible MarkUp Language">XML</abbr>

</p>

<h1>Abbreviation(缩略语列表)</h1>

</body>

</html>

效果如下:

from w3c 表明了出处,超链接也指向了来源的地方.

在html元素的属性里有一个accseekey属性,这个属性可以把一个元素与键盘上的某个特定按键关联在一起,这对那些不能或不喜欢使用鼠标来浏览网页的人们很有用。对于有视力障碍的人士,键盘快捷方式肯定会带来方便。

注意：设置太多的快捷键往往会适得其反,他们或许可能会与浏览器内建的键盘快捷方式发生冲突。

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

    <title></title>

    <script src="js/utility.js" type="text/javascript"></script>

    <script src="js/index.js" type="text/javascript"></script>

</head>

<body>

<ul id="navigation">

<li><a href="javascript:void(0)" accesskey="1">Home</a></li>

<li><a href="javascript:void(0)" accesskey="4">Search</a></li>

<li><a href="javascript:void(0)" accesskey="9">Contact</a></li>

</ul>

<h1>What is the Document Object Model?</h1>

<p>The <abbr title="World Wide Web Consortium(联合)">W3C</abbr> defines the <abbr title="Document Object Model">DOM</abbr> as:</p>

<blockquote cite="http://www.w3.org/DOM/" title="W3C">

   <p>

   A platform- and language-neutral(中立语言) interface that will allows paograms and scripts to dynamically access and update the

   content,structrue and the style of documents.

   </p>

</blockquote>

<p>

It is an <abbr title="Application Programming Interface">API</abbr> that can be used to navigate(驾驶,操控) <abbr title="HyperText MarkUp Language">HTML</abbr>

and <abbr title="eXtensible MarkUp Language">XML</abbr>

</p>

<h1>Abbreviation(缩略语列表)</h1>

</body>

</html>

js代码：

//展示网页快捷键清单

//display the list of shortcut key

function displayAccessKeys() {

    if (!checkCompatibility()) return;   //check compatibility

    var links = document.getElementsByTagName("a");

    var keys = new Array();

    for (var i = 0; i < links.length; i++) {

        var current_link = links[i];

        if (!current_link.getAttribute("accesskey")) continue;

        var key = current_link.getAttribute("accesskey"); //get the key

        var text = current_link.firstChild.nodeValue;   //get the description

        keys[key] = text;

    }

    var ul = document.createElement("ul");

    for (key in keys) {

        var li = document.createElement("li");

        var li_txt = key + " : " + keys[key];

        var item = document.createTextNode(li_txt);

        li.appendChild(item);

        ul.appendChild(li);

    }

    var tit = document.createElement("h3");

    var tit_text = document.createTextNode("state of shortcut key(快捷键说明)");

    tit.appendChild(tit_text);

    document.getElementsByTagName("body")[0].appendChild(tit);

    document.getElementsByTagName("body")[0].appendChild(ul);

}

//display the list of shortcut key  end

/*

检查浏览器的兼容性,是否支持查用的DOM方法

check the compatibility of the broswer

*/

function checkCompatibility() {

    if (!document.getElementById) return false;

    if (!document.createElement) return false;

    if (!document.createTextNode) return false;

    if (!document.getElementsByTagName) return false;

    if (!document.getElementsByName) return false;

    return true;

}

输出如下:

巴特西

JavaScript之充实文档的内容

最新文章

热门文章