1 <!DOCTYPE html> 2 <html> 3 <head lang="en"> 4 <meta charset="UTF-8"> 5 <title>判断文本中回车的数量</title> 6 </head> 7 <body> 8 <textarea id="t" cols="30" rows="10"> 9 </textarea> 10 <button id="btn" onclick="tom()">获取</button> 11 <script> 12 13 var tom = function () { 14 c = document.getElementById(‘t‘).value; 15 var counts = c.split(‘\n‘).length - 1; 16 alert(‘总共有‘ + counts + "个回车"); 17 } 18 </script> 19 20 </body> 21 </html>
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>判断文本中回车的数量</title>
</head>
<body>
<textarea id="t" cols="30" rows="10">
</textarea>
<button id="btn" onclick="tom()">获取</button>
<script>
var tom = function () {
c = document.getElementById(‘t‘).value;
var counts = c.split(‘\n‘).length - 1;
alert(‘总共有‘ + counts + "个回车");
}
</script>
</body>
</html>
原文：http://www.cnblogs.com/mx2036/p/7099072.html
