<!doctype html> <html> <head> <meta charset="utf-8"> <meta name="author" content="智能社 - zhinengshe.com" /> <meta name="copyright" content="智能社 - zhinengshe.com" /> <title>智能社 - www.zhinengshe.com</title> <style> </style> <script> window.onload = function(){ var oText = document.getElementsByTagName("input")[0]; oText.onkeydown = function(ev){ var oEvent = ev || event; //0 48 9 57 var keyCode = oEvent.keyCode; //alert(keyCode);esc没有 if((keyCode < 48 || keyCode >57) && keyCode != 8 && keyCode != 37 && keyCode != 39){ return false; } }; }; </script> </head> <body> <input type="text" value="" /> </body> </html>