关于spit分组问题
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<script type="text/javascript">
var mystr="weadadawdaddawd";
document.write(mystr.split("-",5)+"<br />");
document.write(mystr.split("")+ "<br />");
document.write(mystr.split("",5)+"<br />");
</script>
</head>
<body>
</body>
</html>
为什么上面的”-“，不能分割成5个，分隔符也没出来
