- <!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;
- //如果為空，則通過校驗
- if(str == ""){
- alert("輸入為空");
- 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("不是一個郵箱");
- else
- alert("是一個郵箱");
- }
- </script>
- </head>
- <body>
- <input type="text" id="myText" />
- <input type="button" onclick="checkEmail()" value="驗證是否郵箱" />
- </body>
- </html>
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