jQuery实现的浮动层div浏览器居中显示效果

2019-11-19 17:45:12

字体：大中小

来源：转载

供稿：网友

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>您收到了来自武林网的回复</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.VeVB.COm/');">查看武林网</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>您收到了来自武林网的回复</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.VeVB.COm/');">查看武林网</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：