When we browse the web, we often see the LOADING prompt that appears when data is loading. In fact, the principle of this function is very simple, that is, a DIV covers the current page, and then Loading is displayed on the covered DIV layer. Now let's implement it.
1.Current page:
Copy the code code as follows:
<div><a href="#" onclick="showLoading()">Loading</a></div>
2. Mask layer:
Copy the code code as follows:
<div id="over"></div>
3.Loading display layer:
Copy the code code as follows:
<div id="layout"><img src="//files.VeVB.COm/file_images/article/201311/2013112931.gif" /></div>
Overall code:
Copy the code code as follows:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<style type="text/css">
.current a {
font-size: 20px;
}
.over {
display: none;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: #f5f5f5;
opacity:0.5;
z-index: 1000;
}
.layout {
display: none;
position: absolute;
top: 40%;
left: 40%;
width: 20%;
height: 20%;
z-index: 1001;
text-align:center;
}
</style>
<script type="text/javascript">
function showLoading()
{
document.getElementById("over").style.display = "block";
document.getElementById("layout").style.display = "block";
}
</script>
</head>
<body>
<div><a href="#" onclick="showLoading()">Loading</a></div>
<div id="over"></div>
<div id="layout"><img src="//files.VeVB.COm/file_images/article/201311/2013112931.gif" /></div>
</body>
</html>
Final effect:
I also saw another implementation method on the Internet. I think the idea is good, which is to use JS to continuously change the value of the html tag to achieve the effect of loading prompts. According to his idea, I implemented it myself. The code is as follows:
Copy the code code as follows:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<!-- <script src="Scripts/jquery-1.8.2.js"></script>-->
<style type="text/css">
#tb {
width: 100%;
height: 100%;
line-height: 10px;
}
#tb tr td {
text-align: center;
}
.progressbar {
font-family: Arial;
font-weight: bolder;
color: gray;
background-color: white;
padding: 0px;
border-style: none;
}
.percent {
font-family: Arial;
color: gray;
text-align: center;
border-width: medium;
border-style: none;
}
</style>
<script type="text/javascript">
var bar = 0;
var step = "||";
/*
*The first way is: $(document).ready(function(){.....});
*/
//$(function () {
// progress();
//});
/*
*The second way
*/
//window.onload = function () {
// progress();
//}
/*
*The third way simulates $(document).ready(function(){.....});
*/
(function () {
var ie = !!(window.attachEvent && !window.opera);
var wk = /webkit//(/d+)/i.test(navigator.userAgent) && (RegExp.$1 < 525);
var fn = [];
var run = function () { for (var i = 0; i < fn.length; i++) fn[i](); };
var d = document;
d. ready = function (f) {
if (!ie && !wk && d.addEventListener)
return d.addEventListener('DOMContentLoaded', f, false);
if (fn.push(f) > 1) return;
if (i.e.)
(function () {
try { d.documentElement.doScroll('left'); run(); }
catch (err) { setTimeout(arguments.callee, 0); }
})();
else if (wk)
var t = setInterval(function () {
if (/^(loaded|complete)$/.test(d.readyState))
clearInterval(t), run();
}, 0);
};
})();
document.ready(function () {
progress();
});
function progress() {
bar = bar + 2;
step = step + "||";
document.getElementById("percent").value = bar + "%";
document.getElementById("progressbar").value = step;
if (bar <= 98) {
setTimeout("progress()", 100);
}
}
</script>
</head>
<body>
<table id="tb">
<tr>
<td>
<input type="text" size="50" id="percent" /></td>
</tr>
<tr>
<td>
<input type="text" size="50" id="progressbar" /></td>
</tr>
</table>
</body>
</html>
Final effect: