jquery截取字符串

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<!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> <mce:script src="http://jqueryjs.googlecode.com/files/jquery-1.3.2.min.js" mce_src="http://jqueryjs.googlecode.com/files/jquery-1.3.2.min.js" type="text/javascript"></mce:script> <mce:style></mce:style><style mce_bogus="1"> *{ 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> <mce:script type="text/javascript"></mce: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>