<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>新建网页 1</title>
</head><body>
<input type="text" name="txt" onkeyup="chkInput(this)">
<script language="javascript">
<!--
function chkInput(o)
{
var l=o.value.length;
for (var i=0;i<l;i++)
{
if (o.value.charCodeAt(i)>0&&o.value.charCodeAt(i)<255)
{
alert("只能输入中文");
o.value = o.value.substring(0,i);
return;
}
}
}
//-->
</script>
</body></html>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>新建网页 1</title>
</head><body>
<input type="text" name="txt" onkeyup="chkInput(this)">
<script language="javascript">
<!--
function chkInput(o)
{
var l=o.value.length;
for (var i=0;i<l;i++)
{
if (o.value.charCodeAt(i)>0&&o.value.charCodeAt(i)<255)
{
alert("只能输入中文");
o.value = o.value.substring(0,i);
return;
}
}
}
//-->
</script>
</body></html>
<head>
<script language="javascript">
function funcChina(){
var obj = document.frm.txtName.value;
if(/^[\u4e00-\u9fa5]+$/.test(obj))
{
alert("不能含有汉字!");
return false;
}
return true;
}
</script>
</head>
<form name=frm>
<body>
<br>
<input type=text name=txtName> <input type=button name=butTxt value="判断是否是汉字" onclick="funcChina()"><br>
</form>
</body>
</html>
<script language="javascript">
function testCode()
{
if (event.keyCode < 0x4e00 || event.keyCode > 0x9fa5)
event.keyCode = 0;
}
</script>