首页 > 语言 > JavaScript > 正文

JS判断不能为空实例代码

2024-05-06 15:56:15
字体:
来源:转载
供稿:网友
这篇文章主要介绍了JS判断不能为空实例代码,有需要的朋友可以参考一下

复制代码 代码如下:


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <meta http-equiv="Content-Type" content="text/html"; charset="utf-8">
        <title>短信系统</title>
<script language="javascript">       
        function formcheck(){
            if(document.form.zhanghao.value==""){
                alert("号码不能为空!");
                this.form1.zhanghao.focus();
                return false;
            }else if(document.form.email.value==""){
                alert("内容不能为空!")
                this.form1.eamil.focus();
                return false;
            }else form1.submit(); 
}
        </script>
    </head>

    <body>
        <form method="post" action="sendmail.php">
            <table>
                <h2>
                    <tr>
                        <th colspan="8">发送短信</th>
                    </tr>
                </h2>

                <body>

                        <tr bgcolor="#eeeeee">
                            <td>号   码:</td>
                            <td><textarea cols="80" rows="15"></textarea></td>
                        </tr>
                        <tr bgcolor="#eeeeee">
                            <td>内   容:</td>
                            <td><textarea cols="80" rows="15"></textarea></td>
                        </tr>

                        <tr bgcolor="#eeeeee">
                <td colspan="2">
                    <input type="button" value="发 送">      
                    <input type="reset" value="重 置">
                </td>
                        </tr>
                </body>
            </table>
        </form>
    </body>
</html>

发表评论 共有条评论
用户名: 密码:
验证码: 匿名发表

图片精选