Question

求Css高手，导航栏鼠标经过时显示下拉项菜单，子项显示空白。

第一次打开页面的时候，显示两个空白项。

鼠标经过一次以后，又正常了。

css 代码：

.ddsmoothmenu{
font: bold 13px arial;
/*background: #414141;*/ /*background of menu bar (default state)*/
width: 100%;
}

.ddsmoothmenu ul{
z-index:100;
margin: 0;
padding: 0;
list-style-type: none;
}

/*Top level list items*/
.ddsmoothmenu ul li{
position: relative;
display: inline;
float: left;
width:22%;
text-align: left;
}
.ddsmoothmenu ul .nav_line{
width:auto;
}
.ddsmoothmenu ul .ts_line{
width:28%;
}

#no_state{ background:none;}

/*Top level menu link items style*/
.ddsmoothmenu ul li a{
display: block;
background: #0c68db; /*background of menu items (default state)*/
color: white;
padding: 10px 11px;
color: #2d2b2b;
text-decoration: none;
}

* html .ddsmoothmenu ul li a{ /*IE6 hack to get sub menu links to behave correctly*/
display: inline-block;
}

.ddsmoothmenu ul li a:link, .ddsmoothmenu ul li a:visited{
color: white;
}

.ddsmoothmenu ul li a.selected{ /*CSS class that's dynamically added to the currently active menu items' LI A element*/
background: black;
color: white;
}

.ddsmoothmenu ul li a:hover{
background: #333; /*background of menu items during onmouseover (hover state)*/
color: white;
}

/*1st sub level menu*/
.ddsmoothmenu ul li ul{
position: absolute;
left: 0;
display: none; /*collapse all sub menus to begin with*/
visibility: hidden;
}

/*Sub level menu list items (undo style from Top level List Items)*/
.ddsmoothmenu ul li ul li{
display: list-item;
float: none;
text-align:left;
left: 0;

}

/*All subsequent sub menu levels vertical offset after 1st level sub menu */
.ddsmoothmenu ul li ul li ul{
top: 0;
display: none; /*collapse all sub menus to begin with*/
visibility: hidden;
}

/* Sub level menu links style */
.ddsmoothmenu ul li ul li a{
font: normal 13px Verdana;
width: 160px; /*width of sub menus*/
padding: 5px;
margin: 0;
border-top-width: 0;
border-bottom: 1px solid gray;
}

/* Holly Hack for IE \*/
* html .ddsmoothmenu{height: 1%;} /*Holly Hack for IE7 and below*/

/* ######### CSS classes applied to down and right arrow images ######### */

.downarrowclass{
position: absolute;
top: 12px;
right: 7px;
}

.rightarrowclass{
position: absolute;
top: 6px;
right: 5px;
}

/* ######### CSS for shadow added to sub menus ######### */

.ddshadow{
position: absolute;
left: 0;
top: 0;
width: 0;
height: 0;
background: silver;
}

.toplevelshadow{ /*shadow opacity. Doesn't work in IE*/
opacity: 0.8;
}

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Answer 1

你这里只有CSS样式 我怎么知道哪个样式对应的那个地方啊……有没有网址啊