日期:2014-05-17 浏览次数:20827 次
<!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=utf-8" />
<title>无标题文档</title>
<script type="text/javascript">
window.onload = function() {
var obj = document.getElementsByName('userName')[0];
obj.onkeyup = function() {
if (this.value.length > 15) this.value = this.value.substring(0, 15);
}
}
</script>
</head>
<body>
<input name="userName" class="text" value="" />
</body>
</html>