jQuery method to implement return to top effect

jQuery method to implement return to top effect_jquery

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Release： 2016-05-16 15:57:11

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The example in this article describes how jQuery implements the return to top effect. Share it with everyone for your reference. The specific implementation method is as follows:

1. First is the CSS style:

/*updown*/ 
#shangxia{position:fixed;top:83%;right:42%;margin-right:-543px;display:block;_display:none} 
#shang,#comt,#xia{background:url(../images/sprite.png) no-repeat;position:relative;cursor:pointer;height:25px;width:29px;margin:10px 0 0} 
#shang{background-position:0 -308px}#comt{background-position:0 -338px;height:32px} 
#xia{background-position:0 -376px} 
#comt:hover{background-position:-31px -338px}#shang:hover{background-position:-31px -308px} 
#xia:hover{background-position:-31px -376px}

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2. Next is the jquery code: (to introduce the jQuery core library)

Copy code The code is as follows:

/*updown*/ 

jQuery(document).ready(function($) {$body = (window.opera) ? (document.compatMode == "CSS1Compat" ? $("html") : $("body")) : $("html ,body");$("#shang").mouseover(function() {up()}).mouseout(function() {clearTimeout(fq)}).click(function() {$body.animate({ scrollTop: 0},400)});$("#xia").mouseover(function() {dn()}).mouseout(function() {clearTimeout(fq)}).click(function() {$ body.animate({scrollTop: $(document).height()},400)});$("#comt").click(function() {$body.animate({scrollTop: $("#comments" ).offset().top},400)});});function up() {$wd = jQuery(window);$wd.scrollTop($wd.scrollTop() - 1);fq = setTimeout(" up()", 50)};function dn() {$wd = jQuery(window);$wd.scrollTop($wd.scrollTop() 1);fq = setTimeout("dn()", 50)}; 

3. Reference page:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html> 
 <head> 
  <base href="<%=basePath%>"> 
  <title>My JSP 'index.jsp' starting page</title> 
  <meta http-equiv="pragma" content="no-cache"> 
  <meta http-equiv="cache-control" content="no-cache"> 
  <meta http-equiv="expires" content="0">   
  <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
  <meta http-equiv="description" content="This is my page"> 
  <!-- 
  <link rel="stylesheet" type="text/css" href="styles.css"> 
  --> 
  <style type="text/css"> 
    /*updown*/ 
    #shangxia{position:fixed;top:60%;right:50%;margin-right:-543px;display:block;_display:none} 
    #shang,#comt,#xia{background:url(images/sprite.png) no-repeat;position:relative;cursor:pointer;height:25px;width:29px;margin:10px 0 0} 
    #shang{background-position:0 -308px}#comt{background-position:0 -338px;height:32px}#xia{background-position:0 -376px} 
    #comt:hover{background-position:-31px -338px}#shang:hover{background-position:-31px -308px}#xia:hover{background-position:-31px -376px} 
    /*存档*/ 
  </style> 
  ///上面的是内部样式，上面已经有外部样式，如果不使用内部样式可以引入外部样式 
  <script type="text/javascript" src="http://code.jquery.com/jquery-1.10.1.min.js"></script> 
  <script type="text/javascript" src="http://code.jquery.com/jquery-migrate-1.2.1.min.js"></script> 
  <script type="text/javascript" src="js/updown/devework.js"></script>
 </head> 
 <body> 
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    <div id="shangxia"> 
      <div id="shang" title="↑ 返回顶部"></div> 
      <div id="comt" title="沙发还没有被抢哦"></div> 
      <div id="xia" title="↓ 移至底部"></div> 
    </div> 
 </body> 
</html>

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I hope this article will be helpful to everyone’s jQuery programming.