onkeydown 解决按回车键直接提交方案
登陆页面需要扑捉用户按下回车自动提交的需求:
在body里添加onkeydown事件 跳javascript 在提交表单。
查找文档如下
onkeydown 事件会在用户按下一个键盘按键时发生。
语法：onkeydown="SomeJavaScriptCode"
支持该事件的html标签;
<a>, <acronym>, <address>, <area>, <b>, <bdo>, <big>, <blockquote>, <body>, <button>, <caption>, <cite>, <code>, <dd>, <del>, <dfn>, <div>, <dt>, <em>, <fieldset>, <form>, <h1> to <h6>, <hr>, <i>, <input>, <kbd>, <label>, <legend>, <li>, <map>, <object>, <ol>, <p>, <pre>, <q>, <samp>, <select>, <small>, <span>, <strong>, <sub>, <sup>, <table>, <tbody>, <td>, <textarea>, <tfoot>, <th>, <thead>, <tr>, <tt>, <ul>, <var>
支持该事件的javascript对象：
document, image, link, textarea浏览器差异：
Internet Explorer 使用 event.keyCode 取回被按下的字符，而 Netscape/Firefox/Opera 使用 event.which。
实例：在本例中，用户无法在输入框中键入数字
[html]
<html>
<body>
<script type="text/javascript">
function noNumbers(e)
{
var keynum
var keychar
var numcheck
if(window.event) // IE
{
keynum = e.keyCode
}
else if(e.which) // Netscape/Firefox/Opera
{
keynum = e.which
}
keychar = String.fromCharCode(keynum)
numcheck = /\d/
return !numcheck.test(keychar)
}
</script>
<form>
<input type="text" onkeydown="return noNumbers(event)" />
</form>
</html>
<html>
<body>
<script type="text/javascript">
function noNumbers(e)
{
var keynum
var keychar
var numcheck
if(window.event) // IE
{
keynum = e.keyCode
}
else if(e.which) // Netscape/Firefox/Opera
{
keynum = e.which
}
keychar = String.fromCharCode(keynum)
numcheck = /\d/
return !numcheck.test(keychar)
}
</script>
<form>
<input type="text" onkeydown="return noNumbers(event)" />
</form>
</html>
补充：Web开发 , ASP.Net ,
