js弹出对话框方式小结_javascript技巧
本文实例总结了js弹出对话框方式。分享给大家供大家参考，具体如下：
一般常用的是 alert prompt confirm三种对话框
示例1：
<html>
<head>
<title>Example 简单对话框</title>
</head>
<body>
<script type="text/JavaScript">
<!--
alert("Good Morning!");
//alert只接受一个参数，这个参数是一个字符串，alert所做的全部事情是将这个字符串
//原封不动地以一个提示框返回给用户，我们在前面已经多次见到了这种用法
alert("Hello, "+ prompt("What's your name?")+ "!");
//prompt是一个询问框，它产生一个询问输入窗口，同时等待用户输入的结果
//以继续执行下面的程序，当用户输入完成，点击确认后，它会将输入的字符串返回
//如果用户点了取消按钮，那么它会返回null
if(confirm("Are you ok?"))
//confirm是一个确认框，它产生一个Yes|No的确认提示框，如果回答了Yes，它返回true
//如果回答了No，它返回false
alert("Greate! ");
else
alert("Oh, what's wrong?");
-->
</script>
</body>
也可以自己定义新窗口模拟对话框
示例2：
<html>
<head>
<title>Example模拟对话框</title>
</head>
<body>
<button onclick="opennew()">打开</button>
<script type="text/JavaScript">
<!--
function opennew(){
//doucment.createElement可以用来构造新的DOM对象
var w=document.createElement("div");
//下面一组style属性控制了模拟窗口的样式
//DOM提供的style属性可以很方便地让JavaScript控制元素的展现方式
w.style.top=50;
w.style.left=50;
w.style.height=100;
w.style.width=300;
w.style.position="absolute";
w.style.background="#00ffff";
w.style.paddingTop = 10;
//通过appendChild()方法将创建的div元素对象添加到body的内容中去
w.innerHTML+=("<center>I D :<input><br>密码:<input><br></center>");
document.body.appendChild(w);
}
-->
</script>
</body>
</html>
另外，js基于confirm的确认 取消对话框也非常常见，总结如下：
一种：
二种：
<script language="JavaScript">
function delete_confirm(e)
{
if (event.srcElement.outerText == "删除")
{
event.returnValue = confirm("删除是不可恢复的，你确认要删除吗？");
}
}
document.onclick = delete_confirm;
</script>
<a href="Delete.aspx" onClick="delete_confirm">删除</a>
三种：
if(window.confirm('你确定要取消交易吗？')){
//alert("确定");
return true;
}else{
//alert("取消");
return false;
}
四种：
<script language="JavaScript">
function delete_confirm() <!--调用方法-->
{
event.returnValue = confirm("删除是不可恢复的，你确认要删除吗？");
}
</script>
附：js 弹出对话框3种方式完整实例：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>三种弹出对话框的用法实例</title>
<script language="javascript">
function ale()
{
//这个基本没有什么说的，就是弹出一个提醒的对话框
alert("我敢保证，你现在用的是演示一");
}
function firm()
{
//利用对话框返回的值 （true 或者 false）
if(confirm("你确信要转去风亦飞的博客？"))
{
//如果是true ，那么就把页面转向thcjp.cnblogs.com
location.href="http://www.jb51.net/";
}
else
{
//否则说明下了，赫赫
alert("你按了取消，那就是返回false");
}
}
function prom()
{
var name=prompt("请输入您的名字","");//将输入的内容赋给变量 name ，
//这里需要注意的是，prompt有两个参数，前面是提示的话，后面是当对话框出来后，在对话框里的默认值
if(name)//如果返回的有内容
{
alert("欢迎您："+ name)
}
}
</script>
</head>
<body>
<p>对话框有三种</p>
<p>1：只是提醒，不能对脚本产生任何改变；</p>
<p>2：一般用于确认，返回 true 或者 false ，所以可以轻松用于 ifelse判断 </p>
<p>3：一个带输入的对话框，可以返回用户填入的字符串，常见于某些留言本或者论坛输入内容那里的 插入UBB格式图片 </p>
<p>下面我们分别演示：</p>
<p>演示一：提醒 对话框</p>
<p>
<input type="submit" name="Submit" value="提交" onclick="ale()" />
</p>
<p>演示二 ：确认对话框 </p>
<p>
<input type="submit" name="Submit2" value="提交" onclick="firm()" />
</p>
<p>演示三 ：要求用户输入，然后给个结果</p>
<p>
<input type="submit" name="Submit3" value="提交" onclick="prom()" />
</p>
</body>
</html>希望本文所述对大家JavaScript程序设计有所帮助。
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