为attr添加id title等效果。
<script language="javascript" type="text/javascript">
$(document).ready(function(){
//$('div.chapter a').attr({'rel':'external'});
$('div.chapter a').each(function(index){
var $linkthis=$(this)
$linkthis.attr({
'rel':'external',
'id':'wikilink-'+index,
'title':'你好，现在在试验'+$linkthis.text()
});
});
$('#wikilink-1').css('fontSize',33);
});
</script>完整测试代码：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>DOM Manipulation</title>
</head>
<body>
<!-- Begin example -->
<h1 id="f-title">Flatland: A Romance of Many Dimensions</h1>
<div id="f-author">by Edwin A. Abbott</div>
<h2>Part 1, Section 3</h2>
<h3 id="f-subtitle">Concerning the Inhabitants of Flatland</h3>
<div id="excerpt">an excerpt</div>
<div class="chapter">
<p class="square">Our Professional Men and Gentlemen are Squares (to which class I myself belong) and Five-Sided Figures or <a href="http://en.wikipedia.org/wiki/Pentagon">Pentagons</a>.</p>
<p class="nobility hexagon">Next above these come the Nobility, of whom there are several degrees, beginning at Six-Sided Figures, or <a href="http://en.wikipedia.org/wiki/Hexagon">Hexagons</a>, and from thence rising in the number of their sides till they receive the honourable title of <a href="http://en.wikipedia.org/wiki/Polygon">Polygonal</a>, or many-Sided. Finally when the number of the sides becomes so numerous, and the sides themselves so small, that the figure cannot be distinguished from a <a href="http://en.wikipedia.org/wiki/Circle">circle</a>, he is included in the Circular or Priestly order; and this is the highest class of all.</p>
<p><span class="pull-quote">It is a Law of Nature <span class="drop">with us</span> that a male child shall have <strong>one more side</strong> than his father</span>, so that each generation shall rise (as a rule) one step in the scale of development and nobility. Thus the son of a Square is a Pentagon; the son of a Pentagon, a Hexagon; and so on.</p>
</div>
<script type="text/javascript" src="https://jiangweishan.com/demo/js/jq.js"></script>
<script type="text/javascript">
$(document).ready(function(){
//$('div.chapter a').attr({'rel':'external'});
$('div.chapter a').each(function(index){
var $linkthis=$(this)
$linkthis.attr({
'rel':'external',
'id':'wikilink-'+index,
'title':'你好，现在在试验'+$linkthis.text()
});
});
$('#wikilink-1').css('fontSize',33);
});
</script>
</body>
</html> 
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