限制中文输入和Copy

<input name="checi" type="text" size="20"
οnkeyup="value=value.replace(/[\u4E00-\u9FFF]/g,'')"

onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[\u4E00-\u9FFF]/g,''))">

禁止中文输入和copy

<input οnpaste="return false;" type="text" name="textfield" style="width:400px;  ime-mode:disabled" value="I only accept English input! Thanks for corporation!">