页脚不按预期运行

Question

我在网页上设置了一个30px高的白色页脚。出于某种原因，当我向下滚动页面时，页脚比这更高，文本部分（浅灰色背景的div）与页面重叠。 你知道什么是错的，如何解决这个问题？ Jsfiddle在这里：http://jsfiddle.net/Grek/AdX3m/ 非常感谢

这是截图

CSS

    @charset"UTF-8";
/* CSS Document */
body:before {
    content: "";
    position: fixed;
    top: -10px;
    left: 0;
    width: 100%;
    height: 10px;
    -webkit-box-shadow: 0px 0px 10px rgba(0,0,0,.8);
    -moz-box-shadow: 0px 0px 10px rgba(0,0,0,.8);
    box-shadow: 0px 0px 10px rgba(0,0,0,.8);
    z-index: 100;
}
Html, body {
    padding: 0;
    margin: 0;
    height: 100%;
    font-family: 'Open Sans', sans-serif;
}
#header {
    width: 100%;
    height: 60px;
    border-bottom: 1px dotted #CCC;
    background: #F2F2F2;
}
#logo {
    position: absolute;
    left: 20px;
    top: 35px;
    color: #000;
    font-size: 20px;
}
#header-text {
    width: 400px;
    position: absolute;
    top: 70px;
    left: 20px;
    font-size: 12px;
    font-weight:300;
    color: #FFF;
}
#wrap {
    min-height: 100%;
    height: 100%;
    position: relative;
    background: #0063C3; /* Old browsers */
    background: -moz-linear-gradient(45deg, #0063C3 0%, #2E88C9 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left bottom, right top, color-stop(0%, #0063C3), color-stop(100%, #2E88C9)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(45deg, #0063C3 0%, #2E88C9 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(45deg, #0063C3 0%, #2E88C9 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(45deg, #0063C3 0%, #2E88C9 100%); /* IE10+ */
    background: linear-gradient(45deg, #0063C3 0%, #2E88C9 100%); /* W3C */
 filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#0063C3', endColorstr='#2E88C9', GradientType=1 )
}


#footer {
    position: fixed; /* Force it to stick to the bottom*/
    width: 100%;
    bottom: 0;
    height: 30px;
    background: #fff;
}

/* mainmenu */

#mainmenu {
    width: 100%;
    /* min-height: 180px; */
    padding-bottom: 20px;
    margin-top: -42px; 
    /* padding-top: -42px; */
    overflow: hidden;
}
#mainmenu ul {
    list-style: none;
    margin: 0;
    float: right;
    color: #000;
}
#mainmenu ul li {
    display: inline-block;
    float: left;
    width: 140px;
    line-height: 20px;
}
#mainmenu>ul>li {
    margin-left: 20px;
}
#mainmenu ul li a {
    font-size: 12px;
    display: block;
    text-decoration: none;
}
#mainmenu ul li a, #mainmenu ul ul:hover li a {
    color: #fff;
    -moz-transition-property: all, -moz-transform;
    -moz-transition-duration: .4s, .4s, .4s, .4s;
    -moz-transition-timing-function: ease-out, ease-in, linear, ease-in-out;
    -ms-transition-property: all, -ms-transform;
    -ms-transition-duration: .4s, .4s, .4s, .4s;
    -ms-transition-timing-function: ease-out, ease-in, linear, ease-in-out;
    -o-transition-property: all, -o-transform;
    -o-transition-duration: .4s, .4s, .4s, .4s;
    -o-transition-timing-function: ease-out, ease-in, linear, ease-in-out;
    -webkit-transition-property: all, -webkit-transform;
    -webkit-transition-duration: .4s, .4s, .4s, .4s;
    -webkit-transition-timing-function: ease-out, ease-in, linear, ease-in-out;
    transition-property: all, transform;
    transition-duration: .4s, .4s, .4s, .4s;
    transition-timing-function: ease-out, ease-in, linear, ease-in-out;
}
#mainmenu ul ul li a:hover, #mainmenu ul ul li.current-menu-item a {
    color: #005EBC;
    -moz-transition-property: all, -moz-transform;
    -moz-transition-duration: .4s, .4s, .4s, .4s;
    -moz-transition-timing-function: ease-out, ease-in, linear, ease-in-out;
    -ms-transition-property: all, -ms-transform;
    -ms-transition-duration: .4s, .4s, .4s, .4s;
    -ms-transition-timing-function: ease-out, ease-in, linear, ease-in-out;
    -o-transition-property: all, -o-transform;
    -o-transition-duration: .4s, .4s, .4s, .4s;
    -o-transition-timing-function: ease-out, ease-in, linear, ease-in-out;
    -webkit-transition-property: all, -webkit-transform;
    -webkit-transition-duration: .4s, .4s, .4s, .4s;
    -webkit-transition-timing-function: ease-out, ease-in, linear, ease-in-out;
    transition-property: all, transform;
    transition-duration: .4s, .4s, .4s, .4s;
    transition-timing-function: ease-out, ease-in, linear, ease-in-out;
}
p {
    font-size: 13px;
    color: #fff;
    text-align:justify;
    font-weight:300;
}
h1 {
    font-size: 30px;
    color: #fff;
    /* display: inline-block; */
    }

H5 {
    text-transform: uppercase;
    margin-bottom: 5px;
}

div#content-left {
    float: left;
    width: 35%;
    background: lightblue;
}
div#content-right {
    float: right;
    width: 60%;
    padding-right: 50px;
    background:#ccc;
}
div#content-center {
    overflow: hidden;
}

HTML：

<!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>Document sans nom</title>
<link href='http://fonts.googleapis.com/css?family=Open+Sans:400,300,600,700' rel='stylesheet' type='text/css'>
<link href="normalize.css" rel="stylesheet" type="text/css" />
<link href="style.css" rel="stylesheet" type="text/css" />
<script src="prefixfree.min.js"></script>
</head>

<body>
<div id="wrap">
  <div id="header"></div>
  <div id="logo">My Name</div>
  <div id="mainmenu">
    <ul>
      <li>
        <h5>Menu I</h5>
        <ul>
          <li><a title="" href="">Biography</a> </li>
          <li><a title="" href="">Publications</a> </li>
        </ul>
      <li>
        <h5>Menu 2</h5>
        <ul>
          <li><a title="" href="">Demo</a> </li>
          <li><a title="" href="">Features</a> </li>
          <li><a title="" href="">Comparison</a> </li>
        </ul>
      </li>
      <li>
        <h5>Menu 3</h5>
        <ul>
          <li><a title="" href="">Item 1</a> </li>
          <li><a title="" href="">Item 2</a> </li>
          <li><a title="" href="">Item 3</a> </li>
        </ul>
      </li>
      <li>
        <h5>Menu 4</h5>
        <ul>
          <li><a title="" href="">ddfd</a> </li>
          <li><a title="" href="">dsfd</a> </li>
        </ul>
      </li>
    </ul>
  </div>
  <!-- END DIV Main Menu -->

    <div id="header-text">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
      tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
      quis nostrud exercitation ullamco laboris nisi ut.</div>

    <div id="content-left">column1</div>
    <div id="content-right">
      <h1>Novitates autem si spem</h1>
      <p>Novitates autem si spem adferunt, ut tamquam in herbis non fallacibus
        fructus appareat, non sunt illae quidem repudiandae, vetustas tamen suo
        loco conservanda; maxima est enim vis vetustatis et consuetudinis. Quin
        in ipso equo, cuius modo feci mentionem, si nulla res impediat, nemo est,
        quin eo, quo consuevit, libentius utatur quam intractato et novo. Nec vero
        in hoc quod est animal, sed in iis etiam quae sunt inanima, consuetudo
        valet, cum locis ipsis delectemur, montuosis etiam et silvestribus, in
        quibus diutius commorati sumus.</p>
      <p>Duplexque isdem diebus acciderat malum, quod et Theophilum insontem atrox
        interceperat casus, et Serenianus dignus exsecratione cunctorum, innoxius,
        modo non reclamante publico vigore, discessit.</p>
      <p>Duplexque isdem diebus acciderat malum, quod et Theophilum insontem atrox
        interceperat casus, et Serenianus dignus exsecratione cunctorum, innoxius,
        modo non reclamante publico vigore, discessit.</p>
      <p>Ultima Syriarum est Palaestina per intervalla magna protenta, cultis abundans
        terris et nitidis et civitates habens quasdam egregias, nullam nulli cedentem
        sed sibi vicissim velut ad perpendiculum aemulas: Caesaream, quam ad honorem
        Octaviani principis exaedificavit Herodes, et Eleutheropolim et Neapolim
        itidemque Ascalonem Gazam aevo superiore exstructas.</p>
      <p>Itaque verae amicitiae difficillime reperiuntur in iis qui in honoribus
        reque publica versantur; ubi enim istum invenias qui honorem amici anteponat
        suo? Quid? Haec ut omittam, quam graves, quam difficiles plerisque videntur
        calamitatum societates! Ad quas non est facile inventu qui descendant.
        Quamquam Ennius recte.</p>
              <p>Itaque verae amicitiae difficillime reperiuntur in iis qui in honoribus
        reque publica versantur; ubi enim istum invenias qui honorem amici anteponat
        suo? Quid? Haec ut omittam, quam graves, quam difficiles plerisque videntur
        calamitatum societates! Ad quas non est facile inventu qui descendant.
        Quamquam Ennius recte.</p>
              <p>Itaque verae amicitiae difficillime reperiuntur in iis qui in honoribus
        reque publica versantur; ubi enim istum invenias qui honorem amici anteponat
        suo? Quid? Haec ut omittam, quam graves, quam difficiles plerisque videntur
        calamitatum societates! Ad quas non est facile inventu qui descendant.         reque publica versantur; ubi enim istum invenias qui honorem amici anteponat
        suo? Quid? Haec ut omittam, quam graves, quam difficiles plerisque videntur
        calami
        Quamquam Ennius recte.</p>
              <p>Ultima Syriarum est Palaestina per intervalla magna protenta, cultis abundans
        terris et nitidis et civitates habens quasdam egregias, nullam nulli cedentem
        sed sibi vicissim velut ad perpendiculum aemulas: Caesaream, quam ad honorem
        Octaviani principis exaedificavit Herodes, et Eleutheropolim et Neapolim
        itidemque Ascalonem Gazam aevo superiore exstructas.</p>
      <p>Itaque verae amicitiae difficillime reperiuntur in iis qui in honoribus
        reque publica versantur; ubi enim istum invenias qui honorem amici anteponat
        suo? Quid? Haec ut omittam, quam graves, quam difficiles plerisque videntur
        calamitatum societates! Ad quas non est facile inventu qui descendant.
        Quamquam Ennius recte. END END END</p>
    </div>

  <div id="footer">Test Footer</div>
  <!-- END DIV Footer --> 
</div>
<!-- END DIV Wrap -->
</body>
</html>

Answer 1

从样式页脚中删除

position:fixed;

或者如果希望页脚粘在底部

，请更改一些高度值或字体大小

Answer 2

向下滚动时，页脚的高度不会改变，它保持不变。问题在于您的元素高度，尤其是#wrap，这会影响您设置的background-color样式...

您可以尝试为#wrap

设置背景颜色样式，而不是在body中设置背景颜色样式

body { background: #0063C3; ... }

这可能会解决您所描述的问题。