我需要更改警告框中“确定”按钮的样式。
<head>
<script type="text/javascript">
function show_alert() {
alert("Hello! I am an alert box!");
}
</script>
</head>
<body>
<input type="button" onclick="show_alert()" value="Show alert box" />
</body>警报框是一个系统对象，不受 CSS 约束。要完成这种风格的事情，您需要创建一个 HTML 元素并模仿其alert()功能。jQuery UI Dialogue 为您做了很多工作，基本上按照我的描述工作：Link。
我尝试使用脚本来使用 alert()框样式。java-script这里我使用了那些 JS 和 CSS。
请参阅此编码 JS 功能。
var ALERT_TITLE = "Oops!";
var ALERT_BUTTON_TEXT = "Ok";
if(document.getElementById) {
window.alert = function(txt) {
createCustomAlert(txt);
}
}
function createCustomAlert(txt) {
d = document;
if(d.getElementById("modalContainer")) return;
mObj = d.getElementsByTagName("body")[0].appendChild(d.createElement("div"));
mObj.id = "modalContainer";
mObj.style.height = d.documentElement.scrollHeight + "px";
alertObj = mObj.appendChild(d.createElement("div"));
alertObj.id = "alertBox";
if(d.all && !window.opera) alertObj.style.top = document.documentElement.scrollTop + "px";
alertObj.style.left = (d.documentElement.scrollWidth - alertObj.offsetWidth)/2 + "px";
alertObj.style.visiblity="visible";
h1 = alertObj.appendChild(d.createElement("h1"));
h1.appendChild(d.createTextNode(ALERT_TITLE));
msg = alertObj.appendChild(d.createElement("p"));
//msg.appendChild(d.createTextNode(txt));
msg.innerHTML = txt;
btn = alertObj.appendChild(d.createElement("a"));
btn.id = "closeBtn";
btn.appendChild(d.createTextNode(ALERT_BUTTON_TEXT));
btn.href = "#";
btn.focus();
btn.onclick = function() { removeCustomAlert();return false; }
alertObj.style.display = "block";
}
function removeCustomAlert() {
document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer"));
}
和CSS for alert()Box
#modalContainer {
background-color:rgba(0, 0, 0, 0.3);
position:absolute;
width:100%;
height:100%;
top:0px;
left:0px;
z-index:10000;
background-image:url(tp.png); /* required by MSIE to prevent actions on lower z-index elements */
}
#alertBox {
position:relative;
width:300px;
min-height:100px;
margin-top:50px;
border:1px solid #666;
background-color:#fff;
background-repeat:no-repeat;
background-position:20px 30px;
}
#modalContainer > #alertBox {
position:fixed;
}
#alertBox h1 {
margin:0;
font:bold 0.9em verdana,arial;
background-color:#3073BB;
color:#FFF;
border-bottom:1px solid #000;
padding:2px 0 2px 5px;
}
#alertBox p {
font:0.7em verdana,arial;
height:50px;
padding-left:5px;
margin-left:55px;
}
#alertBox #closeBtn {
display:block;
position:relative;
margin:5px auto;
padding:7px;
border:0 none;
width:70px;
font:0.7em verdana,arial;
text-transform:uppercase;
text-align:center;
color:#FFF;
background-color:#357EBD;
border-radius: 3px;
text-decoration:none;
}
/* unrelated styles */
#mContainer {
position:relative;
width:600px;
margin:auto;
padding:5px;
border-top:2px solid #000;
border-bottom:2px solid #000;
font:0.7em verdana,arial;
}
h1,h2 {
margin:0;
padding:4px;
font:bold 1.5em verdana;
border-bottom:1px solid #000;
}
code {
font-size:1.2em;
color:#069;
}
#credits {
position:relative;
margin:25px auto 0px auto;
width:350px;
font:0.7em verdana;
border-top:1px solid #000;
border-bottom:1px solid #000;
height:90px;
padding-top:4px;
}
#credits img {
float:left;
margin:5px 10px 5px 0px;
border:1px solid #000000;
width:80px;
height:79px;
}
.important {
background-color:#F5FCC8;
padding:2px;
}
code span {
color:green;
}
和HTML 文件：
<input type="button" value = "Test the alert" onclick="alert('Alert this pages');" />
并查看此演示：JSFIDDLE和演示结果图像
不可能。如果要自定义对话框的视觉外观，则需要使用基于 JS 的解决方案，例如jQuery.UI 对话框。
您需要像这样创建自己的警报框：
function jAlert(text, customokay){
document.getElementById('jAlert_content').innerHTML = text;
document.getElementById('jAlert_ok').innerHTML = customokay;
document.body.style.backgroundColor = "gray";
document.body.style.cursor="wait";
}
jAlert("Stop! Stop!", "<b>Okay!</b>");#jAlert_table, #jAlert_th, #jAlert_td{
border: 2px solid blue;
background-color:lightblue;
border-collapse: collapse;
width=100px;
}
#jAlert_th, #jAlert_td{
padding:5px;
padding-right:10px;
padding-left:10px;
}
#jAlert{
/* Position fixed */
position:fixed;
/* Center it! */
top: 50%;
left: 50%;
margin-top: -50px;
margin-left: -100px;
}<p>TEXT</p>
<div id="jAlRem">
<div id="jAlert">
<table id="jAlert_table">
<tr id="jAlert_tr">
<td id="jAlert_td"> <p id="jAlert_content"></p> </td>
<td id="jAlert_td"> <button id='jAlert_ok' onclick="jAlertagree()"></button> </td>
</tr>
</table>
</div>
</div>
<p>TEXT</p>
<p>TEXT</p>
<p>TEXT</p>
<p>TEXT</p>
<p>TEXT</p>
<p>TEXT</p>
<p>TEXT</p>
<p>TEXT</p>
<p>TEXT</p>
<p>TEXT</p>
<p>TEXT</p>
<p>TEXT</p>
<script>
function jAlertagree(){
var parent = document.getElementById('jAlRem');
var child = document.getElementById('jAlert');
parent.removeChild(child);
document.body.style.backgroundColor="white";
document.body.style.cursor="default";
}
</script>js 部分获取 HTML 中的元素来创建警报框，然后在用户单击确定后将其删除。
您可以使用 jAlert("Custom Text", "Ok!");