<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>无标题文档</title> <script language="JavaScript"> function isChinese(temp) { var re = /[u4e00-u9fa5]+/; if(re.test(temp.value)){ alert("中文888888888888888888。"); temp.value=""; temp.focus(); return false; } } </script> </head> <body> <form id="form1" name="form1" method="post" action=""> <input type="text" name="haha" id="haha" onkeyup="isChinese(this);" onpaste="return false" ondragenter="return false" oncontextmenu="return false;" /> </form> </body> </html>