html-文本域显示输入字数
<!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>无标题文档</title>
</head>
<script language="javascript" >
function countChar(textareaNamezzjs,spanName){
document.getElementById(spanName).innerHTML=document.getElementById
(textareaNamezzjs).value.length;
}
</script>
<body>
已经输入<span id="counter">0</span>字<br>
<textarea id="status" name="status" cols="50" rows="5" onkeydown="countChar('status','counter');" onkeyup="countChar('status','counter');">
</textarea>
</body>
</html>
