我正在使用 jQuery字符过滤器，它在 jsfiddle 上工作得很好 - http://jsfiddle.net/itamarperetz/VgjJs/1/
我在自己的计算机上使用相同的代码（到目前为止，我在 xampp、apache 上运行代码），但它根本不起作用——我可以输入我想要的任何字符（在 jsfiddle 中我' m 无法按预期键入 ".!$^$@$" 等。
*我已经导入了 jQuery 并检查了它是否正确导入。
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js">
</script>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1255">
<title>Insert title here</title>
<script type="text/javascript">
/*
* This plugin filters keyboard input by specified regular expression.
* Version 1.7
* $Id$
*
* Source code inspired by Ext.JS (Ext.form.TextField, Ext.EventManager)
*
* Procedural style:
* $('#ggg').keyfilter(/[\dA-F]/);
* Also you can pass test function instead of regexp. Its arguments:
* this - HTML DOM Element (event target).
* c - String that contains incoming character.
* $('#ggg').keyfilter(function(c) { return c != 'a'; });
*
* Class style:
* <input type="text" class="mask-num" />
*
* Available classes:
* mask-pint: /[\d]/
* mask-int: /[\d\-]/
* mask-pnum: /[\d\.]/
* mask-money /[\d\.\s,]/
* mask-num: /[\d\-\.]/
* mask-hex: /[0-9a-f]/i
* mask-email: /[a-z0-9_\.\-@]/i
* mask-alpha: /[a-z_]/i
* mask-alphanum: /[a-z0-9_]/i
*/
(function($)
{
var defaultMasks = {
pint: /[\d]/,
'int': /[\d\-]/,
pnum: /[\d\.]/,
money: /[\d\.\s,]/,
num: /[\d\-\.]/,
hex: /[0-9a-f]/i,
email: /[a-z0-9_\.\-@]/i,
alpha: /[a-z_]/i,
alphanum: /[a-z0-9_]/i
};
var Keys = {
TAB: 9,
RETURN: 13,
ESC: 27,
BACKSPACE: 8,
DELETE: 46
};
// safari keypress events for special keys return bad keycodes
var SafariKeys = {
63234 : 37, // left
63235 : 39, // right
63232 : 38, // up
63233 : 40, // down
63276 : 33, // page up
63277 : 34, // page down
63272 : 46, // delete
63273 : 36, // home
63275 : 35 // end
};
var isNavKeyPress = function(e)
{
var k = e.keyCode;
k = $.browser.safari ? (SafariKeys[k] || k) : k;
return (k >= 33 && k <= 40) || k == Keys.RETURN || k == Keys.TAB || k == Keys.ESC;
};
var isSpecialKey = function(e)
{
var k = e.keyCode;
var c = e.charCode;
return k == 9 || k == 13 || (k == 40 && (!$.browser.opera || !e.shiftKey)) || k == 27 ||
k == 16 || k == 17 ||
(k >= 18 && k <= 20) ||
($.browser.opera && !e.shiftKey && (k == 8 || (k >= 33 && k <= 35) || (k >= 36 && k <= 39) || (k >= 44 && k <= 45)))
;
};
/**
* Returns a normalized keyCode for the event.
* @return {Number} The key code
*/
var getKey = function(e)
{
var k = e.keyCode || e.charCode;
return $.browser.safari ? (SafariKeys[k] || k) : k;
};
var getCharCode = function(e)
{
return e.charCode || e.keyCode || e.which;
};
$.fn.keyfilter = function(re)
{
return this.keypress(function(e)
{
if (e.ctrlKey || e.altKey)
{
return;
}
var k = getKey(e);
if($.browser.mozilla && (isNavKeyPress(e) || k == Keys.BACKSPACE || (k == Keys.DELETE && e.charCode == 0)))
{
return;
}
var c = getCharCode(e), cc = String.fromCharCode(c), ok = true;
if(!$.browser.mozilla && (isSpecialKey(e) || !cc))
{
return;
}
if ($.isFunction(re))
{
ok = re.call(this, cc);
}
else
{
ok = re.test(cc);
}
if(!ok)
{
e.preventDefault();
}
});
};
$.extend($.fn.keyfilter, {
defaults: {
masks: defaultMasks
},
version: 1.7
});
$(document).ready(function()
{
var tags = $('input[class*=mask],textarea[class*=mask]');
for (var key in $.fn.keyfilter.defaults.masks)
{
tags.filter('.mask-' + key).keyfilter($.fn.keyfilter.defaults.masks[key]);
}
});
})(jQuery);
</script>
</head>
<body>
<label><input type="text" class="mask-alphanum" /> - mask-alphanum</label>
</body>
</html>
如果您有任何想法可能是什么问题，任何建议都会有所帮助！
提前致谢