<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <meta charset="utf-8" /> <script type="text/javascript"> window.onload = function () { var zhengce = /^[0-9]{6}$/; var emailZC = /([-a-zA-Z_0-9.]+)@([-a-zA-Z0-9_]+(\.[a-zA-Z]+)+)/; var txtObj = document.getElementById('txt1'); document.getElementById('btn1').onclick = function () { var b = zhengce.test(txtObj.value); alert(b); } document.getElementById('btn2').onclick = function () { var b = emailZC.test(txtObj.value); alert(b); } } </script> </head> <body> <input type="text" id="txt1" /> <input type="button" id="btn1" value="判断是否是邮编"/> <input type="button" id="btn2" value="判断是否是邮箱" /> </body> </html>