简单的：str = jQuery.trim(str);
1 var temp = " aa b "; 2 console.log("cc" + temp); 3 temp = jQuery.trim(temp); 4 console.log("cc" + temp);
自己写的：
1 <!DOCTYPE html>
2 <html xmlns="http://www.w3.org/1999/xhtml">
3 <head>
4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
5 <title></title>
6 <script src="Js/jquery-1.8.2.min.js"></script>
7 <script type="text/javascript">
8 function trim(str) {
9 str = str.replace(/^(s|u00A0)+/, '');
10 for (var i = str.length - 1; i >= 0; i--) {
11 if (/S/.test(str.charAt(i))) {
12 str = str.substring(0, i + 1);
13 break;
14 }
15 }
16 return str;
17 }
18 $(function () {
19 $("#bt").click(function () {
20 var temp = $('#tes');
21 var c = temp[0];
22 alert('test' + trim(temp.val()) + 'str')
23 })
24 })
25 </script>
26 </head>
27 <body>
28 输入：<input id="tes" type="text" /><br />
29 <input id="bt" type="button" value="检测" />
30 </body>
31 </html>