用JavaScript限制textarea輸入長度 (For: IE、Firefox ...)[

2019-11-21 02:24:17

字體：大中小

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供稿：網友

<!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" lang="gb2312">  <head>  <head>  <title> Code：用JavaScript限制textarea輸入長度 (For: IE、Firefox ...)</title>  <meta http-equiv="content-type" content="text/html; charset=gb2312" />  <meta name="author" content="http://www.survivalescaperooms.com/"/>  <meta name="keywords" content="textarea,輸入長度" />  <meta name="description" content="用JavaScript限制textarea輸入長度 (For: IE、Firefox ...)" />  <style type="text/css" media="all">   body {font-size:14px;}  </style>  </head>  <body>  maxlength=10  <textarea maxlength="10" onkeyup="return isMaxLen(this)"></textarea>    maxlength=20  <textarea maxlength="20" onkeyup="return isMaxLen(this)"></textarea>  <script type="text/javascript">  function isMaxLen(o){   var nMaxLen=o.getAttribute? parseInt(o.getAttribute("maxlength")):"";   if(o.getAttribute && o.value.length>nMaxLen){   o.value=o.value.substring(0,nMaxLen)   }  }  </script>  </body>  </html>

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