UL问题的宽度，css宽度不起作用

时间：2012-08-31 14:28:22

标签： jquery css html width

我的例子是：http://www.interfaithmedical.com/sfish/example.html

它包含一个html标记：

<ul class="sf-menu">

我想将UL的宽度拉伸到960px。每个LI均匀拉伸，并且能够在没有任何填充的情况下将其放入DIV内。我尝试在主UL上添加宽度：

.sf-menu ul {
    position: absolute;
    top: -999em;
    width: 960px;
}

但宽度未设置为960px。 width：属性似乎无效。

这是HTML文件：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

<html lang="en">  
  <head>
    <title>A very basic Superfish menu example</title>
    <meta http-equiv="content-type" content="text/html;charset=utf-8">
    <link rel="stylesheet" type="text/css" href="css/superfish.css" media="screen">
    <script src="http://code.jquery.com/jquery-1.7.1.min.js" type="text/javascript"></script>
    <script type="text/javascript" src="js/hoverIntent.js"></script>
    <script type="text/javascript" src="js/superfish.js"></script>
    <script type="text/javascript">
      // initialise plugins
      jQuery(function () {
        jQuery('ul.sf-menu').superfish();
      });
    </script>
  </head>

  <body>
    <div style="width: 960px; height: 2.2em; border: 1px solid blue;">
      <ul class="sf-menu">
        <li class="current"> <a href="#a">Medical Services</a>
          <ul>
            <li><a href="#aa">Behavioral Health</a></li>
            <li><a href="#aa">Clinical Labrotary</a></li>
            <li><a href="#aa">Dentistry</a></li>
            <li><a href="#aa">Emergency</a></li>
            <li><a href="#aa">Gynecology</a></li>
            <li><a href="#aa">Medicine</a></li>
            <li><a href="#aa">Pastoral</a></li>
            <li><a href="#aa">Pediatrics</a></li>
            <li><a href="#aa">Physical Medicine & Rehab</a></li>
            <li><a href="#aa">Radiology</a></li>
            <li><a href="#aa">Surgery</a></li>
            <li><a href="#aa">Women's Health</a></li>
            <li><a href="#aa">Other Services</a></li>
          </ul>
        </li>

        <li class="current"> <a href="#a">About Us</a>
          <ul>
            <li><a href="#aa">Behavioral Health</a></li>
            <li><a href="#aa">Clinical Labrotary</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
          </ul>
        </li>

        <li class="current"> <a href="#a">Medical Educations</a>
          <ul>
            <li><a href="#aa">Behavioral Health</a></li>
            <li><a href="#aa">Clinical Labrotary</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
          </ul>
        </li>

        <li class="current"> <a href="#a">Patients & Visitors</a>
          <ul>
            <li><a href="#aa">Behavioral Health</a></li>
            <li><a href="#aa">Clinical Labrotary</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
            <li><a href="#aa">menu item that is quite long</a></li>
          </ul>
        </li>

        <li><a href="findDoctors.php" class="navlink">Find a Doctor</a></li>
        <li><a href="contactUs.php" class="navlink">Contact Us</a></li>
      </ul>
    </div>
  </body>
</html>

这是CSS文件superfish.css：

/*** ESSENTIAL STYLES ***/
* {
    padding: 0;
    margin: 0;
}

.sf-menu, .sf-menu * {
    margin: 0;
    padding: 0;
    list-style: none;
}

.sf-menu {
    line-height: 1.0;
}

.sf-menu ul {
    position: absolute;
    top: -999em;
    width: 10em;
 /* left offset of submenus need to match (see below) 10em */
}

#trt {
    width: 20em;
}

.sf-menu ul li {
    width: 100%;
}

.sf-menu li:hover {
    visibility: inherit;
 /* fixes IE7 'sticky bug' */
}

.sf-menu li {
    float: left;
    position: relative;
}

.sf-menu a {
    display: block;
    position: relative;
}

.sf-menu li:hover ul,
    .sf-menu li.sfHover ul {
    left: 0;
    top: 2.2em;
 /* match top ul list item height */
    z-index: 99;
}

ul.sf-menu li:hover li ul,
    ul.sf-menu li.sfHover li ul {
    top: -999em;
}

ul.sf-menu li li:hover ul,
    ul.sf-menu li li.sfHover ul {
    left: 10em;
 /* match ul width */
    top: 0;
}

ul.sf-menu li li:hover li ul,
    ul.sf-menu li li.sfHover li ul {
    top: -999em;
}

ul.sf-menu li li li:hover ul,
    ul.sf-menu li li li.sfHover ul {
    left: 10em;
 /* match ul width */
    top: 0;
}

    /*** DEMO SKIN ***/
.sf-menu {
    float: left;
    margin-bottom: 1em;
}

.sf-menu a {
    border-left: 1px solid #fff;
    border-top: 1px solid #CFDEFF;
    padding: .75em 1em;
    text-decoration: none;
}

.sf-menu a, .sf-menu a:visited {
 /* visited pseudo selector so IE6 applies text colour*/
    color: #FFFFFF;
    font-family: Verdana;
    font-size: 13px;
}

.sf-menu li {
    background: #1B83EF;
}

.sf-menu li li {
    background: #1B83EF;
}

.sf-menu li:hover, .sf-menu li.sfHover,
    .sf-menu a:focus, .sf-menu a:hover, .sf-menu a:active {
    background: #12ACFC;
    outline: 0;
}

    /*** arrows **/
.sf-menu a.sf-with-ul {
    padding-right: 2.25em;
    min-width: 1px;
 /* trigger IE7 hasLayout so spans position accurately */
}

.sf-sub-indicator {
    position: absolute;
    display: block;
    right: .75em;
    top: 1.05em;
 /* IE6 only */
    width: 10px;
    height: 10px;
    text-indent: -999em;
    overflow: hidden;
    background: url('../images/arrows-ffffff.png') no-repeat -10px -100px;
 /* 8-bit indexed alpha png. IE6 gets solid image only */
}

a > .sf-sub-indicator {
  /* give all except IE6 the correct values */
    top: .8em;
    background-position: 0 -100px;
 /* use translucent arrow for modern browsers*/
}
    /* apply hovers to modern browsers */
a:focus > .sf-sub-indicator,
    a:hover > .sf-sub-indicator,
    a:active > .sf-sub-indicator,
    li:hover > a > .sf-sub-indicator,
    li.sfHover > a > .sf-sub-indicator {
    background-position: -10px -100px;
 /* arrow hovers for modern browsers*/
}

    /* point right for anchors in subs */
.sf-menu ul .sf-sub-indicator {
    background-position: -10px 0;
}

.sf-menu ul a > .sf-sub-indicator {
    background-position: 0 0;
}
    /* apply hovers to modern browsers */
.sf-menu ul a:focus > .sf-sub-indicator,
    .sf-menu ul a:hover > .sf-sub-indicator,
    .sf-menu ul a:active > .sf-sub-indicator,
    .sf-menu ul li:hover > a > .sf-sub-indicator,
    .sf-menu ul li.sfHover > a > .sf-sub-indicator {
    background-position: -10px 0;
 /* arrow hovers for modern browsers*/
}

    /*** shadows for all but IE6 ***/
.sf-shadow ul {
    background: url('../images/shadow.png') no-repeat bottom right;
    padding: 0 8px 9px 0;
    -moz-border-radius-bottomleft: 17px;
    -moz-border-radius-topright: 17px;
    -webkit-border-top-right-radius: 17px;
    -webkit-border-bottom-left-radius: 17px;
}

.sf-shadow ul.sf-shadow-off {
    background: transparent;
}

1 个答案:

答案 0 :(得分：2)

将问题分解为更简单，更简单的部分，直到它开始正常工作。取出不必要的代码来制作最简单的<ul><li></li></ul>列表，然后取出CSS文件中不必要的CSS。这是一个消除过程，找出阻止width属性生效的原因。可能是superfish中的某些内容覆盖了您的width属性。

CSS中存在大量语法错误。要找出superfish与CSS代码不匹配的确切性质，您必须简化它并删除语法错误。 CSS是非常宽容的，它让你把废话放在那里，它会尝试解释它。在这种情况下，你有大括号不与其他人对齐。必须回到基础并删除语法错误。

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