jQuery实现的浮动层div浏览器居中显示效果

时间:2020-05-15 hfhwfw 人气:0

本文实例讲述了jQuery实现的浮动层div浏览器居中显示效果。分享给大家供大家参考，具体如下：

1.在页面的head中引入jQuery

<script type="text/javascript" language="javascript" src="jquery-1.7.2.min.js"></script>

2.在页面的head中加入浮动层和遮罩层的样式

<style>
#previewDiv{z-index: 9999;position:absolute;display:none;background:#fff;border-top:5px solid #999;border-bottom:7px solid #999;border-left:5px solid #999;border-right:7px solid #999;}
.mask {color:#C7EDCC;background-color:#999;position:absolute;top:0px;left:0px;width:100%;height:3000px;opacity: 0.6;filter: "alpha(opacity=60)";filter: alpha(Opacity=60);}
</style>

3.在页面的底部加上浮动的div

<div id="previewDiv">
  <table id ="head">
    <tr><td>短消息预览</td></tr>
  </table>
  <table align="center">
    <tr><td>
      <div class="zhnx_neirong">
        <h3>您收到了来自的回复</h3>
        <p class="duanluo">  内容：这是浮动层居中的实例</span></p>
      </div>
      <div class="zhnx_huifu"><p><a href="javascript:open('//www.qb5200.com/');">查看</a></p></div>
    </td></tr>
  </table>
  <table align="center">
    <tr><td><div><input type="button" value=" 关 闭 " onclick="hide();"/></div></td></tr>
  </table>
</div>

4.添加显示和隐藏的js函数

function show(){
    //添加并显示遮罩层
    $("<div id='mask'></div>").addClass("mask").click(function() {}) .appendTo("body").fadeIn(0);
    document.getElementById("mask").style.display = "block";
    var windowWidth = document.documentElement.clientWidth;
    var windowHeight = document.documentElement.clientHeight;
    var popupHeight = $("#previewDiv").height();
    var popupWidth = $("#previewDiv").width();
    $("#previewDiv").css({
      "position": "absolute",
      "top": (windowHeight-popupHeight)/2+$(document).scrollTop(),
      "left": (windowWidth-popupWidth)/2
    });
    $("#previewDiv").show();
}
function hide(){
    $("#mask").remove();
    $("#previewDiv").hide();
}

完整实例代码如下：

<!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=utf-8" />
<title>Test</title>
<script type="text/javascript" language="javascript" src="jquery-1.7.2.min.js"></script>
</head>
<body>
<style>
#previewDiv{z-index: 9999;position:absolute;display:none;background:#fff;border-top:5px solid #999;border-bottom:7px solid #999;border-left:5px solid #999;border-right:7px solid #999;}
.mask {color:#C7EDCC;background-color:#999;position:absolute;top:0px;left:0px;width:100%;height:3000px;opacity: 0.6;filter: "alpha(opacity=60)";filter: alpha(Opacity=60);}
</style>
<div id="previewDiv">
  <table id ="head">
    <tr><td>短消息预览</td></tr>
  </table>
  <table align="center">
    <tr><td>
      <div class="zhnx_neirong">
        <h3>您收到了来自的回复</h3>
        <p class="duanluo">  内容：这是浮动层居中的实例</span></p>
      </div>
      <div class="zhnx_huifu"><p><a href="javascript:open('//www.qb5200.com/');">查看</a></p></div>
    </td></tr>
  </table>
  <table align="center">
    <tr><td><div><input type="button" value=" 关 闭 " onclick="hide();"/></div></td></tr>
  </table>
</div>
<script type="text/javascript" language="javascript" >
 function show(){
    //添加并显示遮罩层
    $("<div id='mask'></div>").addClass("mask").click(function() {}) .appendTo("body").fadeIn(0);
    document.getElementById("mask").style.display = "block";
    var windowWidth = document.documentElement.clientWidth;
    var windowHeight = document.documentElement.clientHeight;
    var popupHeight = $("#previewDiv").height();
    var popupWidth = $("#previewDiv").width();
    $("#previewDiv").css({
      "position": "absolute",
      "top": (windowHeight-popupHeight)/2+$(document).scrollTop(),
      "left": (windowWidth-popupWidth)/2
    });
    $("#previewDiv").show();
  }
  function hide(){
    $("#mask").remove();
    $("#previewDiv").hide();
  }
  show();
</script>
</body>
</html>

运行效果图如下：

希望本文所述对大家jQuery程序设计有所帮助。

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