html - 调整浏览器大小时更改页眉的彩色背景高度

Question

我有一个带有固定页眉和页脚的简单网页。页眉有蓝色背景，正文有白色背景，页脚有黑色背景。

当我将浏览器调整为较小尺寸时，标题的蓝色背景不会改变高度，但内容会溢出到正文中(我使用的是 Dreamweaver 的 Fluid Grid Layout)。这导致页眉的内容看起来像是溢出了页眉，因为背景的高度确实变大了，这是我需要的。

CSS:

@charset "utf-8";
/* Simple fluid media
   Note: Fluid media requires that you remove the media's height and width attributes from the HTML
   http://www.alistapart.com/articles/fluid-images/ 
*/
img, object, embed, video {
    max-width: 100%;
}
/* IE 6 does not support max-width so default to width 100% */
.ie6 img {
    width:100%;
}

/*
    Dreamweaver Fluid Grid Properties
    ----------------------------------
    dw-num-cols-mobile:     5;
    dw-num-cols-tablet:     8;
    dw-num-cols-desktop:    10;
    dw-gutter-percentage:   25;

    Inspiration from "Responsive Web Design" by Ethan Marcotte 
    http://www.alistapart.com/articles/responsive-web-design

    and Golden Grid System by Joni Korpi
    http://goldengridsystem.com/
*/

/* Mobile Layout: 480px and below. */

.gridContainer {
    margin-left: auto;
    margin-right: auto;
    width: 87.36%;
    padding-left: 1.82%;
    padding-right: 1.82%;
}
#LayoutDiv1 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
#LayoutDiv2 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
#LayoutDiv3 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
#LayoutDiv4 {
    clear: none;
    float: left;
    margin-left: 4.1666%;
    width: 100%;
    display: block;
}
#LayoutDiv5 {
    clear: none;
    float: left;
    margin-left: 4.1666%;
    width: 100%;
    display: block;
}
#LayoutDiv6 {
    clear: none;
    float: left;
    margin-left: 4.1666%;
    width: 100%;
    display: block;
}
#LayoutDiv7 {
    clear: none;
    float: left;
    margin-left: 4.1666%;
    width: 100%;
    display: block;
}
#LayoutDiv8 {
    clear: none;
    float: left;
    margin-left: 4.1666%;
    width: 100%;
    display: block;
}
#LayoutDiv9 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
#LayoutDiv10 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}

/* Tablet Layout: 481px to 768px. Inherits styles from: Mobile Layout. */

@media only screen and (min-width: 481px) {
.gridContainer {
    width: 90.675%;
    padding-left: 1.1625%;
    padding-right: 1.1625%;
}
#LayoutDiv1 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
#LayoutDiv2 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
#LayoutDiv3 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
#LayoutDiv4 {
    clear: none;
    float: left;
    margin-left: 2.5641%;
    width: 100%;
    display: block;
}
#LayoutDiv5 {
    clear: none;
    float: left;
    margin-left: 2.5641%;
    width: 100%;
    display: block;
}
#LayoutDiv6 {
    clear: none;
    float: left;
    margin-left: 2.5641%;
    width: 100%;
    display: block;
}
#LayoutDiv7 {
    clear: none;
    float: left;
    margin-left: 2.5641%;
    width: 100%;
    display: block;
}
#LayoutDiv8 {
    clear: none;
    float: left;
    margin-left: 2.5641%;
    width: 100%;
    display: block;
}
#LayoutDiv9 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
#LayoutDiv10 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
}

/* Desktop Layout: 769px to a max of 1232px.  Inherits styles from: Mobile Layout and Tablet Layout. */

@media only screen and (min-width: 769px) {
.gridContainer {
    width: 88.2%;
    max-width: 1232px;
    padding-left: 0.9%;
    padding-right: 0.9%;
    margin: auto;
}
#LayoutDiv1 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
#LayoutDiv2 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
#LayoutDiv3 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
#LayoutDiv4 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 18.3673%;
    display: block;
}
#LayoutDiv5 {
    clear: none;
    float: left;
    margin-left: 2.0408%;
    width: 18.3673%;
    display: block;
}
#LayoutDiv6 {
    clear: none;
    float: left;
    margin-left: 2.0408%;
    width: 18.3673%;
    display: block;
}
#LayoutDiv7 {
    clear: none;
    float: left;
    margin-left: 2.0408%;
    width: 18.3673%;
    display: block;
}
#LayoutDiv8 {
    clear: none;
    float: left;
    margin-left: 2.0408%;
    width: 18.3673%;
    display: block;
}
#LayoutDiv9 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
#LayoutDiv10 {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
}
}

@charset "utf-8";
/* CSS Document */

.gridContainer {
    margin-left: 0px;
    width: 100%;
    padding-left: 0px;
}   

body {
    margin: 0px;
}

#LayoutDiv1 {
    position: fixed;
    height: 70px;
    top: 0px;
    width: 100%;
    z-index: 10000;
    background: #FFF;
    font-size: 70px;
    color:#FFF;
    background-color: #069;
}

#LayoutDiv2 {
    position: fixed;
    height: 30px;
    top: 70px;
    width: 100%;
    z-index: 10002;
    color: #FFF;
    background-color: #069;
    }

#LayoutDiv3 {

    margin-top: 135px;

    }

#LayoutDiv9 {
    position: fixed;
    height: 40px;
    width: 100%;
    z-index:10006;
    background:#FFF;
    max-height: 100px;
    bottom: 15px;
    color: #FFF;
    background-color: #000;
    }

#LayoutDiv10 {

    position: fixed;
    height: 15px;
    width: 100%;
    z-index:10008;
    background:#FFF;
    bottom:0px;
    max-height: 60px;
    color: #FFF;
    background-color: #000;
    }

HTML:

<body>
<div class="gridContainer clearfix">
    <div id="LayoutDiv1">Hello Welcome this is an example of the kind of content that I will input when using my real html. For now I am just trying to get something large enough that is going to effectively spill over into the content. </div>
  <div id="LayoutDiv2"></div>
  <div id="LayoutDiv3"></div>
  <div id="LayoutDiv4"></div>
<div id="LayoutDiv9">Goodbye</div>

<div id="LayoutDiv10"></div>
</div>
</body>

Answer 1

你想过使用 jQuery 吗？

$.(windows).resize(function(){
if (windows.hight > XXX ...
      //then ...
});