This article describes the method of implementing the pop-up layer covering the entire page by js and css. Share it for your reference. The specific implementation method is as follows:
The common styles and structures for framed transparent backgrounds on the pop-up layer are as follows:
The code copy is as follows:.alertMessageBg{
position:fixed;
_position:absolute;
width:100%;
height:100%;
left:0;
top:0;
background:#000;
opacity:0.5;
-moz-opacity:0.5;
filter:alpha(opacity=50);
z-index:97;
display:none;
}
.alertMessageDivBorder{
position:fixed;
_position:absolute;
width:750px;
height:370px;
left:50%;
top:50%;
margin:-185px 0 0 -375px;
background:#000;
filter:alpha(opacity=30);
-moz-opacity:0.3;
opacity:0.3;
z-index:98;
display:none;
}
.alertMessageDiv{
position:fixed;
_position:absolute;
width:730px;
height:350px;
left:50%;
top:50%;
margin:-175px 0 0 -365px;
background:#fff;
z-index:99;
display:none;
font-size:14px;
}
<div></div>
<div></div>
<div></div>
How to cover the entire web page with a pop-up background
1.css method
The code copy is as follows:.alertMessageBg{
position:fixed;
_position:absolute;
width:100%;
height:100%;
left:0;
top:0;
background:#000;
opacity:0.5;
-moz-opacity:0.5;
filter:alpha(opacity=50);
z-index:97;
display:none;
}
2.js method
The code copy is as follows:.alertMessageBg{
position:absolute;
width:100%;
height:100%;
left:0;
top:0;
background:#000;
opacity:0.5;
-moz-opacity:0.5;
filter:alpha(opacity=50);
z-index:97;
display:none;
}
var bgWidth = document.body.clientWidth + 'px',
bgHeight = document.body.clientHeight + 'px',
alertBgNode = $('.alertMessageBg');
alertBgNode.css({'width':bgWidth,'height':bgHeight});
Comparing the above two methods, it is obvious that the css method is easier to use, especially now that it does not need to be compatible with ie6.
I hope this article will be helpful to everyone's JS-based web programming.