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如何让超级链接以及表单弹出警告框

让超级链接弹出警告框代码

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20131008114759

如果是不让表单为空弹出警告的话写一个函数就行,加入写一个不让表单名字为phone的文本框为空,函数如下

<script type=”mce-text/javascript”>
function phone(){
var a=document.getElementById(“phone”).value;
if(phone==””){
alert(“请输入电话”);
return false;
}
}

</script>

在表单处把name和id命名为phone则可,当然后面的onKeyUp是一个只允许输入数字的正则!因需要可以去掉!

<input name=”phone” type=”text” id=”phone” value=”” size=”20″ onKeyUp=”this.value=this.value.replace(/\D/g,”);” >

 

或者是以下的方法

 

<html>
    <head>
        <title>提交表单页</title>
        <script type="text/javascript">
            function myCheck()
            {
               for(var i=0;i<document.form1.elements.length-1;i++)
               {
                  if(document.form1.elements[i].value=="")
                  {
                     alert("当前表单不能有空项");
                     document.form1.elements[i].focus();
                     return false;
                  }
               }
               return true;
              
            }
        </script>
    </head>
    <body>
         <form name="form1" method="post" action="page2.html" onsubmit="return myCheck()">
             用户名:<input type="text" name="username"><br>
             性别:<input type="text" name="sex"><br>
             出生时间:<input type="text" name="birthday"><br>
             <input type="submit" value="提交">
         </form>
    </body>
</html>

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一条评论

  1. Leo说道:

    复制代码的时候注意输入法的大写状态



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