jquery 截取字符串的实现

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>cookie</title> <script src="http://img.jb51.net/jslib/jquery/jquery-1.3.2.min.js" type="text/javascript"></script> <style> *{ margin:0; padding:0;font-family:"宋体",Arial, Helvetica, sans-serif;} #best{ width:300px; height:200px; border:1px solid #ccc; margin:60px auto 0; line-height:1.6; font-size:14px; padding:10px 0 0 10px} .blank{ font-size:18px; font-weight:bold; text-align:center; padding:20px} </style> <script type="text/javascript"> jQuery.fn.limit=function(){     var self = $("div[limit]");     self.each(function(){         var objString = $(this).text();         var objLength = $(this).text().length;         var num = $(this).attr("limit");         if(objLength > num){ $(this).attr("title",objString);             objString = $(this).text(objString.substring(0,num) + "...");         }     }) } $(function(){     $(document.body).limit(); }) </script> </head> <body>     <div class="blank">请按F5刷新页面。。。。</div> <div id="best">     <div limit="12">计算字串的长度长度长度长度</div>     <div limit="10">这边有优化很公开这边</div>     <div limit="12">这边有优化很公开长度长度很公开长度</div>     <div limit="12">计算字长度长度</div>     <div limit="10">这边有优化很边有优化很边有优化很边有优化很边有优化很</div> </div> </body> </html>

[Ctrl+A 全选注:引入外部Js需再刷新一下页面才能执行]

下面是对一些数字进行格式化
我们想改变这么一段代码中间td之间的文本
<table>
<tr id='generated_rows'>
<td class='row_class' id='row_id_1'>1</td>
<td class='row_class' id='row_id_2'>2</td>
<td class='row_class' id='row_id_3'>3</td>
<td class='row_class' id='row_id_4'>4</td>
<td class='row_class' id='row_id_5'>5</td>
</tr>
</table>

实现显示为：

<table>
<tr id='generated_rows'>
<td class='row_class' id='row_id_1'>1.00</td>
<td class='row_class' id='row_id_2'>2.00</td>
<td class='row_class' id='row_id_3'>3.00</td>
<td class='row_class' id='row_id_4'>4.00</td>
<td class='row_class' id='row_id_5'>5.00</td>
</tr>
</table>
实现的函数为：
$('#generated_rows td.row_class').each(function() {
var x = Number($(this).text()).toFixed(2);
$(this).text(x);
});
演示代码

<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Transitional//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'> <html xmlns='http://www.w3.org/1999/xhtml'> <head> <meta http-equiv='Content-Type' content='text/html; charset=gb2312' /> <title>需要F5刷新一下</title> <script src='http://img.jb51.net/jslib/jquery/jquery-1.3.2.min.js' type='text/javascript'></script> <style> *{ margin:0; padding:0;font-family:'宋体',Arial, Helvetica, sans-serif;} #best{ width:300px; height:200px; border:1px solid #ccc; margin:60px auto 0; line-height:1.6; font-size:14px; padding:10px 0 0 10px} .blank{ font-size:18px; font-weight:bold; text-align:center; padding:20px} </style> </head> <body> 需要F5刷新一下 <table> <tr id='generated_rows'> <td class='row_class' id='row_id_1'>1</td> <td class='row_class' id='row_id_2'>2</td> <td class='row_class' id='row_id_3'>3</td> <td class='row_class' id='row_id_4'>4</td> <td class='row_class' id='row_id_5'>5</td> </tr> </table> <script type="text/javascript"> $('#generated_rows td.row_class').each(function() { var x = Number($(this).text()).toFixed(2); $(this).text(x); }); </script> </body> </html>

[Ctrl+A 全选注:引入外部Js需再刷新一下页面才能执行]

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jquery 截取字符串的实现

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