执行javascript函数时显示警报框

执行javascript函数时显示警报框,javascript,html,forms,popup,onsubmit,Javascript,Html,Forms,Popup,Onsubmit,下面的代码给出了一个由我创建的自定义对话框(带有html、css和JS代码),单击按钮时会显示该对话框 <!DOCTYPE html> <html> <head> <style> /* The Modal (background) */ .modal { display: none; /* Hidden by default */ position: fixed; /* Stay in place */ z-index: 1

下面的代码给出了一个由我创建的自定义对话框(带有html、css和JS代码),单击按钮时会显示该对话框

<!DOCTYPE html>
<html>
<head>
<style>
/* The Modal (background) */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1; /* Sit on top */
    padding-top: 100px; /* Location of the box */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgb(0,0,0); /* Fallback color */
    background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}

/* Modal Content */
.modal-content {
    position: relative;
    background-color: #fefefe;
    margin: auto;
    padding: 0;
    border: 1px solid #888;
    width: 80%;
    box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
    -webkit-animation-name: animatetop;
    -webkit-animation-duration: 0.4s;
    animation-name: animatetop;
    animation-duration: 0.4s
}

/* Add Animation */
@-webkit-keyframes animatetop {
    from {top:-300px; opacity:0} 
    to {top:0; opacity:1}
}

@keyframes animatetop {
    from {top:-300px; opacity:0}
    to {top:0; opacity:1}
}

/* The Close Button */
.close {
    color: white;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover,
.close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}

.modal-header {
    padding: 2px 16px;
    background-color: #5cb85c;
    color: white;
}

.modal-body {padding: 2px 16px;}

.modal-footer {
    padding: 2px 16px;
    background-color: #5cb85c;
    color: white;
}
</style>
</head>
<body>

<h2>Animated Modal with Header and Footer</h2>

<!-- Trigger/Open The Modal -->
<button id="myBtn">Open Modal</button>

<!-- The Modal -->
<div id="myModal" class="modal">

  <!-- Modal content -->
  <div class="modal-content">
    <div class="modal-header">
      <span class="close">&times;</span>
      <h2>Modal Header</h2>
    </div>
    <div class="modal-body">
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
    </div>
    <div class="modal-footer">
      <h3>Modal Footer</h3>
    </div>
  </div>

</div>

<script>
// Get the modal
var modal = document.getElementById('myModal');

// Get the button that opens the modal
var btn = document.getElementById("myBtn");

// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];

// When the user clicks the button, open the modal 
btn.onclick = function() {
    modal.style.display = "block";
}

// When the user clicks on <span> (x), close the modal
span.onclick = function() {
    modal.style.display = "none";
}

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
    if (event.target == modal) {
        modal.style.display = "none";
    }
}
</script>

</body>
</html>

/*模态(背景)*/
.莫代尔{
显示:无;/*默认情况下隐藏*/
位置:固定;/*保持原位*/
z指数:1;/*位于顶部*/
填充顶部:100px;/*框的位置*/
左:0;
排名:0;
宽度:100%;/*全宽*/
高度:100%;/*全高*/
溢出:自动;/*根据需要启用滚动*/
背景色:rgb(0,0,0);/*回退色*/
背景色:rgba(0,0,0,0.4);/*黑色w/不透明度*/
}
/*模态内容*/
.模态内容{
位置:相对位置;
背景色:#fefe;
保证金:自动;
填充:0;
边框:1px实心#888;
宽度:80%;
盒影:0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
-webkit动画名称:animatetop;
-webkit动画持续时间:0.4s;
动画名称:animatetop;
动画持续时间:0.4s
}
/*添加动画*/
@-webkit关键帧动画顶点{
从{top:-300px;不透明度:0}
到{顶部:0;不透明度:1}
}
@关键帧动画顶点{
从{top:-300px;不透明度:0}
到{顶部:0;不透明度:1}
}
/*关闭按钮*/
.结束{
颜色:白色;
浮动:对;
字号:28px;
字体大小:粗体;
}
.关闭:悬停,
.结束:聚焦{
颜色:#000;
文字装饰:无;
光标:指针;
}
.模态标题{
填充:2x16px;
背景色:#5cb85c;
颜色:白色;
}
.模态体{填充:2px 16px;}
.模态页脚{
填充:2x16px;
背景色:#5cb85c;
颜色:白色;
}
带有页眉和页脚的动画模态
开放模态
&时代;
模态头
情态体中的一些文本

其他一些文本

模态页脚 //获取模态 var modal=document.getElementById('myModal'); //获取打开模式对话框的按钮 var btn=document.getElementById(“myBtn”); //获取关闭模态的元素 var span=document.getElementsByClassName(“关闭”)[0]; //当用户单击该按钮时,打开模式对话框 btn.onclick=函数(){ modal.style.display=“块”; } //当用户单击(x)时,关闭模式对话框 span.onclick=函数(){ modal.style.display=“无”; } //当用户单击模式之外的任何位置时,将其关闭 window.onclick=函数(事件){ 如果(event.target==模态){ modal.style.display=“无”; } }
我想在提交表单时执行javascript函数中的条件时显示对话框!下面是javascript函数和表单的html代码

<form id=orders name="orders" action="orders_action.php" method="post" enctype="multipart/form-data" onsubmit="return test()">
   function test(){
        var element = document.getElementById("time").value;
        var d = new Date();
        var m = d.getMinutes();
        var h = d.getHours();
       if(h == '0') {h = 24}

      var currentTime = h+"."+m;
      console.log(currentTime);

      // get input time
      var time = element.split(":");
      var hour = time[0];
      if(hour == '00') {hour = 24}
      var min = time[1];

      var inputTime = hour+"."+min;
      console.log(inputTime);

      var totalTime = currentTime - inputTime;
      console.log(totalTime);

      if ((Math.abs(totalTime)) > 2) {

         document.getElementById('time').style.background ='white';



      } 
      else {
         document.getElementById('time').style.background ='#e35152';
        alert("Wrong time");

      }
    }

功能测试(){
var元素=document.getElementById(“时间”).value;
var d=新日期();
var m=d.getMinutes();
var h=d.getHours();
如果(h='0'){h=24}
var currentTime=h+“+m;
console.log(当前时间);
//获取输入时间
var time=element.split(“:”);
var小时=时间[0];
如果(小时='00'){hour=24}
var min=时间[1];
var输入时间=小时+“+”分钟;
控制台日志(输入时间);
var totalTime=当前时间-输入时间;
console.log(总时间);
如果((数学绝对值(总时间))>2){
document.getElementById('time').style.background='white';
} 
否则{
document.getElementById('time').style.background='#e35152';
警报(“错误时间”);
}
}

我想在我创建的对话框中显示“错误的时间消息”,而不是上面JS函数中的警报框!如何实现这一点?

而不是警报功能。编写以下代码(纯Js):

modal.style.display=“block”;
modal.querySelector('.modal body').innerHTML=“错误时间”

”;
modal.style.display = "block";
modal.querySelector('.modal-body').innerHTML="<p>Wrong time</p>";