例子如下：
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>禁止输入中文</title>
<script src="../lib/jquery.min.js"></script>
</head>
<body>
<h1>禁止输入中文</h1>
方法二：onchange事件 ：在松开按键时用脚本检查文本框的值，只保留Unicode编码在0和255之间的字符。 (IOS和安卓已测试通过)
<script>
function check(str){
var temp=""
for(var i=0;i<str.length;i++)
if(str.charCodeAt(i)>0&&str.charCodeAt(i)<255)
temp+=str.charAt(i)
return temp
}
</script>
<input onpaste="return false" id="txt_card1" ondragenter="return false" onchange="this.value=check(this.value)">
<br>
方法三：把所有双字节字符替换为空。
<input onpaste="return false" id="txt_card2" ondragenter="return false" >
<br>
方法四：把中文字符替换为空。
<input onpaste="return false" id="txt_card3" ondragenter="return false" onkeyup="this.value=this.value.replace(/[u0391-uFFE5]/gi,'')">
<input type="button" onclick="NoInputInChinese();" value="验证是否包含中文" />
<h1>禁止输入数字</h1>
<script type="text/javascript">
function NoInputInChinese(obj) {
var str = obj.value;
var temp = ""
for (var i = 0; i < str.length; i++) {
if (str.charCodeAt(i) > 0 && str.charCodeAt(i) < 255)
temp += str.charAt(i);
}
obj.value=temp;
}
//工具方法：禁止输入数字
function noNumbers(e, obj) {
/// <summary>禁止输入数字</summary>
/// <param name="e" type="String">事件</param>
/// <param name="e" type="Object">当前元素</param>
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)
if ((keynum >= 48 && keynum <= 57) || (keynum >= 96 && keynum <= 105)) {
switch(keynum)
{
case 96:
keychar="0";
break;
case 97:
keychar="1";
break;
case 98:
keychar="2";
break;
case 99:
keychar="3";
break;
case 100:
keychar="4";
break;
case 101:
keychar="5";
break;
case 102:
keychar="6";
break;
case 103:
keychar="7";
break;
case 104:
keychar="8";
break;
case 105:
keychar="9";
break;
}
obj.value = obj.value.replace(keychar, '');
}
//keychar = String.fromCharCode(keynum)
//numcheck = /d/
//var flag = numcheck.test(keychar);
//if (flag) {
// obj.value = obj.value.replace(keychar, '');
//}
}
function checkdd(){
alert($("#txtNation").val());
var r =$("#txtNation").val().match("\d");
if (r == null)
{
alert("无匹配数字");
}else
{
alert("已包含数字");
}
}
</script>
<input type="text" id="txtNation" placeholder="您的民族" onkeyup="noNumbers(event,this);" />
<input type="button" onclick="checkdd();" value="测试" />
</body>
</html>
代码：