在CSS水平菜单中恼人的空白

时间：2013-12-12 17:26:09

标签： css html5 css3 drop-down-menu

我需要你的帮助，

我似乎无法弄清楚为什么在我的下拉菜单中会有一个空格在顶部有一些白色，因此，我使用ms画颜色以红色表示我当前的空白例： enter image description here

预期结果如下： enter image description here

这是JSFiddle。

这是我的HTML和CSS标记：

<ul id="mbtopmenuebul_table" class="mbtopmenuebul_menulist css_menu">
  <li class="topitem spaced_li"><div class="buttonbg gradient_button gradient20"><a>File</a></div>
  <ul class="gradient_menu gradient83">
  <li class="gradient_menuitem gradient23"><a title="">Save</a></li>
  <li class="gradient_menuitem gradient23"><a title="">Print</a></li>
  <li class="gradient_menuitem gradient23 last_item"><a title="">Close</a></li>
  </ul></li>
  <li class="topitem spaced_li"><div class="buttonbg gradient_button gradient20"><a>Edit</a></div>
  <ul class="gradient_menu gradient83">
  <li class="gradient_menuitem gradient23"><a title="">Add new</a></li>
  <li class="gradient_menuitem gradient23"><a title="">Delete</a></li>
  <li class="gradient_menuitem gradient23 last_item"><a title="">Clear all</a></li>
  </ul></li>
  <li class="topitem spaced_li"><div class="buttonbg gradient_button gradient20"><a>View</a></div>
  <ul class="gradient_menu gradient109">
  <li class="gradient_menuitem gradient23"><a title="">Next ></a></li>
  <li class="gradient_menuitem gradient23"><a title="">< Prev</a></li>
  <li class="gradient_menuitem gradient23"><a title=""><< First</a></li>
  <li class="gradient_menuitem gradient23 last_item"><a title="">Last >></a></li>
  </ul></li>
  <li class="topitem spaced_li"><div class="buttonbg gradient_button gradient20"><a>Actions</a></div>
  <ul class="gradient_menu gradient109">
  <li class="gradient_menuitem gradient23"><a class="with_arrow" title="">Export</a>
    <ul class="gradient_menu gradient57">
    <li class="gradient_menuitem gradient23"><a title="">Excel</a></li>
    <li class="gradient_menuitem gradient23 last_item"><a title="">HTML</a></li>
    </ul></li>
  <li class="gradient_menuitem gradient23"><a class="with_arrow" title="">Reports</a>
    <ul class="gradient_menu gradient57">
    <li class="gradient_menuitem gradient23"><a title="">Metrics</a></li>
    <li class="gradient_menuitem gradient23 last_item"><a title="">Item</a></li>
    </ul></li>
  <li class="gradient_menuitem gradient23"><a class="with_arrow" title="">E-mail</a>
    <ul class="gradient_menu gradient31">
    <li class="gradient_menuitem gradient23 last_item"><a class="with_arrow" title="">Send</a>
      <ul class="gradient_menu gradient57">
      <li class="gradient_menuitem gradient23"><a title="">Notification</a></li>
      <li class="gradient_menuitem gradient23 last_item"><a title="">Reminder</a></li>
      </ul></li>
    </ul></li>
  <li class="gradient_menuitem gradient23 last_item"><a class="with_arrow" title="">Create</a>
    <ul class="gradient_menu gradient57">
    <li class="gradient_menuitem gradient23"><a title="">Coverpage</a></li>
    <li class="gradient_menuitem gradient23"><a title="">DYMO label</a></li>
    <li class="gradient_menuitem gradient23 last_item"><a title="">Approval sheet</a></li>
    </ul></li>
  </ul></li>
  <li class="topitem spaced_li"><div class="buttonbg gradient_button gradient20"><a>Help</a></div>
  <ul class="gradient_menu gradient83">
  <li class="gradient_menuitem gradient23"><a title="">About IMTS</a></li>
  <li class="gradient_menuitem gradient23"><a title="">Contact support</a></li>
  <li class="gradient_menuitem gradient23 last_item"><a title="">Quick Reference</a></li>
  </ul></li>
  <li class="topitem"><div class="buttonbg gradient_button gradient21" style="width: 38px;height: 19px;"><a>Logoff</a></div></li>
</ul>

CSS 

#mbtopmenuebul_table {
  margin: 0px;
  line-height: 0px;
  font-size: 0px;
  display: inline-block;
  width: 100%;
  padding: 2px; 
  border-left: none;
  border-right: none;
  border-top: 1px solid #B0B5BB;
  border-bottom: 1px solid #B0B5BB;

  background-color: transparent;
  border-collapse: separate;
  background-image: url('wrapper_bg.png');
  background-repeat: repeat-x;
  background: -moz-linear-gradient(top, #EDF4FE 0%, #BFDAFC 100%);
  background: -webkit-linear-gradient(top, #EDF4FE 0%, #BFDAFC 100%);
  background: -ms-linear-gradient(top, #EDF4FE 0%, #BFDAFC 100%);
  background: linear-gradient(top, #EDF4FE 0%, #BFDAFC 100%);
}
#mbtopmenuebul_table li a {
  line-height: 15px;
  font-size: 12px;
  font-family: Arial,sans-serif;
  text-decoration: none;
  color: #333333;
  font-style: normal;
  font-weight: normal;
  padding: 2px;
  display: block;
  cursor: pointer;
  white-space: nowrap;
}

#mbtopmenuebul_table li div.buttonbg {
  height: 18px;
  width: 58px;
  line-height: 0;
  background-color: transparent;
  border-style: solid;
  border-color: transparent;
  border-width: 1px;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
  text-align: center;
}

#mbtopmenuebul_table li:hover div.buttonbg a, #mbtopmenuebul_table li.expanded a.topitem, #mbtopmenuebul_table li.active a.topitem,
#mbtopmenuebul_table li.itemhot a.topitem, #mbtopmenuebul_table li a:hover {
  color: #000;
  text-decoration: none;
}


#mbtopmenuebul_table li.expanded div.buttonbg, #mbtopmenuebul_table li.active div.buttonbg, #mbtopmenuebul_table li.itemhot div.buttonbg, #mbtopmenuebul_table li:hover div.buttonbg {
  background-color: transparent;
  border-color: #7DA2CE;
  color: blue;
}

#mbtopmenuebul_table ul li a {
  color: #333333;
  font-family: Arial,sans-serif;
  font-size: 12px;
  line-height: 15px;
  font-style: normal;
  font-weight: normal;
  text-decoration: none;
  display: block;
  vertical-align: middle;
  white-space: nowrap;
}

#mbtopmenuebul_table ul li:hover > a {
  color: #000000;
  font-family: Arial,sans-serif;
  font-size: 12px;
  font-style: normal;
  font-weight: normal;
  text-decoration: none;
}

#mbtopmenuebul_table ul li.subexpanded a.subexpanded, #mbtopmenuebul_table ul li.subitemhot a.subitemhot, #mbtopmenuebul_table ul li a:hover {
  color: #000000;
  font-family: Arial,sans-serif;
  font-size: 12px;
  font-style: normal;
  font-weight: normal;
  text-decoration: none;
}

#mbtopmenuebul_table ul li:hover, #mbtopmenuebul_table ul li.subexpanded, #mbtopmenuebul_table ul li.subitemhot {
  border-color: #7DA2CE;
  background-color: transparent;
}

#mbtopmenuebul_table ul {
  margin: 0;
  border-style: solid;
  border-color: #B2B7BD;
  border-width: 1px;
  padding: 3px;
  background: transparent;
  font-size: 0;
  border-radius: 0;
}

#mbtopmenuebul_table ul li a {
  padding: 3px 11px 3px 9px;
  text-align: left;
}

#mbtopmenuebul_table ul li.separator {
  padding: 3px;
  cursor: default;
  background: none;
  box-shadow: none;
  border-width: 0;
}

#mbtopmenuebul_table ul li.separator div {
  border-top: 1px solid #D6D9DC;
  font-size: 0px;
}

#mbtopmenuebul_table ul li {
  border-style: solid;
  border-color: transparent;
  border-width: 1px;
  height: auto;
  width: auto;
  text-align: left;
  line-height: 0;
  font-size: 0;
  cursor: pointer;
  float: none;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
  background-color: transparent;
  margin: 0 0 3px 0;
}

#mbtopmenuebul_table ul li.last_item {
  margin-bottom: 0;
}


#mbtopmenuebul_table .spaced_li {
  margin: 0px 10px 0px 0px;
}

#mbtopmenuebul_table a img {
  border: none;
}

#mbtopmenuebul_table li {
  list-style: none;
  float: left;
}

#mbtopmenuebul_table.css_menu li {
  position: relative;
}

#mbtopmenuebul_table.css_menu ul li:hover > ul {
  opacity: 1;
}

#mbtopmenuebul_table.css_menu li:hover > ul {
  top: 100%;
  left: 0;
  right: auto;
  opacity: 1;
}

#mbtopmenuebul_table.css_menu ul li:hover > ul {
  top: -1px;
  left: 100%;
  right: auto;
}

#mbtopmenuebul_table ul {
  position: absolute;
  top:-99999px;
  z-index: 4000;
}

#mbtopmenuebul_table ul ul {
  position: absolute;
  z-index: 5000;
}

#mbtopmenuebul_table li:hover div.gradient21, #mbtopmenuebul_table li.expanded div.gradient21, #mbtopmenuebul_table li.active div.gradient21, #mbtopmenuebul_table li.itemhot div.gradient21 { 
  background-image: url('buttonhot_bg1.png'); 
  background-repeat: repeat-x; 
  background-color: #BFDAFC; 
} 

#mbtopmenuebul_table li:hover div.gradient20, #mbtopmenuebul_table li.expanded div.gradient20, #mbtopmenuebul_table li.active div.gradient20, #mbtopmenuebul_table li.itemhot div.gradient20 { 
  background-image: url('buttonhot_bg.png'); 
  background-repeat: repeat-x; 
  background-color: #BFDAFC; 
} 

#mbtopmenuebul_table li:hover div.gradient_button, #mbtopmenuebul_table li.expanded div.gradient_button, #mbtopmenuebul_table li.active div.gradient_button, #mbtopmenuebul_table li.itemhot div.gradient_button { 
  background: -moz-linear-gradient(top, #EDF4FE 0%, #BFDAFC 100%); 
  background: -webkit-linear-gradient(top, #EDF4FE 0%, #BFDAFC 100%); 
  background: -ms-linear-gradient(top, #EDF4FE 0%, #BFDAFC 100%); 
  background: linear-gradient(top, #EDF4FE 0%, #BFDAFC 100%); 
} 

#mbtopmenuebul_table ul.gradient83 { 
  background-image: url('menu_bg.png'); 
  background-repeat: repeat-x; 
  background-color: #F0F5FB; 
} 

#mbtopmenuebul_table ul.gradient109 { 
  background-image: url('menu_bg1.png'); 
  background-repeat: repeat-x; 
  background-color: #F0F5FB; 
} 

#mbtopmenuebul_table ul.gradient57 { 
  background-image: url('menu_bg2.png'); 
  background-repeat: repeat-x; 
  background-color: #F0F5FB; 
} 

#mbtopmenuebul_table ul.gradient31 { 
  background-image: url('menu_bg3.png'); 
  background-repeat: repeat-x; 
  background-color: #F0F5FB; 
} 

#mbtopmenuebul_table ul li.gradient23:hover, #mbtopmenuebul_table ul li.gradient23.subexpanded, #mbtopmenuebul_table ul li.gradient23.subitemhot { 
  background-image: url('menuitemhot_bg.png'); 
  background-repeat: repeat-x; 
  background-color: #BFDAFC;
} 
#mbtopmenuebul_table ul.gradient_menu { 
  background: -moz-linear-gradient(top, #FFFFFF 0%, #F0F5FB 100%); 
  background: -webkit-linear-gradient(top, #FFFFFF 0%, #F0F5FB 100%); 
  background: -ms-linear-gradient(top, #FFFFFF 0%, #F0F5FB 100%); 
  background: linear-gradient(top, #FFFFFF 0%, #F0F5FB 100%); 
} 
#mbtopmenuebul_table ul li.gradient_menuitem:hover, #mbtopmenuebul_table ul li.gradient_menuitem.subexpanded, #mbtopmenuebul_table ul li.gradient_menuitem.subitemhot { 
  background: -moz-linear-gradient(top, #EDF4FE 0%, #BFDAFC 100%); 
  background: -webkit-linear-gradient(top, #EDF4FE 0%, #BFDAFC 100%); 
  background: -ms-linear-gradient(top, #EDF4FE 0%, #BFDAFC 100%); 
  background: linear-gradient(top, #EDF4FE 0%, #BFDAFC 100%);
}

2 个答案:

答案 0 :(得分：0)

在#mbtopmenuebul_table ul上将此padding: 3px;更改为此padding: 0px 3px;

演示：http://jsfiddle.net/qynC3/1/

答案 1 :(得分：0)

问题是填充#mbtopmenuebul_table ul.gradient_menu：

#mbtopmenuebul_table ul.gradient_menu { 
  background: -moz-linear-gradient(top, #FFFFFF 0%, #F0F5FB 100%); 
  background: -webkit-linear-gradient(top, #FFFFFF 0%, #F0F5FB 100%); 
  background: -ms-linear-gradient(top, #FFFFFF 0%, #F0F5FB 100%); 
  background: linear-gradient(top, #FFFFFF 0%, #F0F5FB 100%);
  padding: 0px;
}
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