js验证email的正则时间：2022-09-19 10:03:47 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=GB2312" /> <title>Untitled Document</title> <script language="JavaScript" type="text/javascript"> function $(obj){ return document.getElementById(obj); } function checkEmail() { var str = $("myText").value; //如果为空，则通过校验 if(str == ""){ alert("输入为空"); return; } if (str.charAt(0) == "." || str.charAt(0) == "@" || str.indexOf('@', 0) == -1|| str.indexOf('.', 0) == -1 || str.lastIndexOf("@") == str.length-1 || str.lastIndexOf(".") == str.length-1) alert("不是一个邮箱"); else alert("是一个邮箱"); } </script> </head> <body> <input type="text" id="myText" /> <input type="button" onclick="checkEmail()" value="验证是否邮箱" /> </body> </html>
