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<html>
<head>
<meta http-equiv="Content-Type" content="text/html" />
<title>只能输入汉字js脚本</title>
</head>
<body>
只能输入汉字:<INPUT onkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,'')">
<script>
function ischinese(s){
var ret=true;
for(var i=0;i<s.length;i++)
ret=ret && (s.charCodeAt(i)>=10000);
return ret;
}
</script>
</body>
</html>