The horizontal navigation of the website cannot be displayed_html/css_WEB-ITnose

I recently helped a friend modify the website. Since I am new to div css, I don’t know why the navigation title is not displayed after adding it. It seems to be covered.
How to modify the navigation menu attributes and values ​​in the file css.css.
I hope my friends can give me some tips, I will post the code later~~

Reply to the discussion (solution)

Maybe the outer layer of the navigation has a width set limit. And added overflow:hidden;

1. The content mentioned above exceeds the width of the outer layer and is hidden.
2. The newly added one is no longer on the same line as the original one. It is too high and hidden
3. The newly added content is blocked by other elements

Use Firebug to take a look and you will know

I recently helped a friend modify the website. Since I am new to div css, I don’t know why the navigation title is not displayed after adding it. It seems to be covered.
How to modify the navigation menu attributes and values ​​in the file css.css.
I hope my friends can give me some tips. I will post the code later~~
The css code is as follows:
body{
font-size:13px;
margin:0px;
padding:0px;
text-align:center;
color:#000;
background:#000;
font-family:Tahoma, Verdana; }

a:link,a:visited{color:#000;text-decoration:none;}
a:hover{color:red;text-decoration: none;}

div,img,ul, ol,dl,dt,dd {
border:0;
list-style:none;
overflow:hidden;
margin:0;
padding:0;
}

h1,h2,h3,h4,h5,h6 {
font-size:12px;
margin:0;
padding:0;
}
/*- --Clear floats---*/
.clear {
clear:both;
height:0;
overflow:hidden;
}

.container{
width: 1050px;
margin:0 auto;
background-color: #CCC;
}

.header{
width: 1050px;
height: 197px ;
background-color: #00F;
}
.hdtop{
width: 1050px;
height: 163px;
background: url(eshow/home_top.gif);
}
.topdh{
width: 1050px;
height: 40px;
background-color: #00F;
background-image: url(eshow/home_dh.gif);
}
.topdh li{
float:left;
margin-left:8px;
margin-top:10px;
list-style:none;
display:table -cell;
padding:0px 5px 0px 5px;}
.topdh a:link,.topdh a:visited{color:#000;text-decoration:none; font-weight:bold; font-size: 13px;}
.topdh a:hover{color:#006600;text-decoration: none; font-weight:bold; font-size:13px;}
.list{
width:auto;
height:auto;
margin: 5px auto;
background-color: #666;
}
.ad000{width:790px; height:74px; margin-bottom:5px;}
.ls_z{
width: 250px;
height:806px;
float: left;
display: inline;
background: #F2F2F2;
}
.ls_y {
width: auto;
height: auto;
margin-left: 5px;
float: left;
display: inline;
}
.ls_dz{
width: 238px;
height:450px;
border:1px solid #DFDFDF;
background-color: #666;
margin-top: 5px;
margin-right: auto;
margin-bottom: 5px;
margin-left: auto;
}
.ls_dz h1,.ls_dz h2,.ls_dz h3{text-align:left; height:25px; line-height :1.8em; padding-left:10px; border-bottom:1px #dfdfdf solid;}
.ls_dz h3{ background:url(eshow/links.gif); padding-left:35px;}
.ls_ad {
width: auto;
height: 30px;
background-color: #999;
}
.ls_fc{
border:1px solid #DFDFDF;
width: auto;
height: 360px;
margin-top: 5px;
margin-right: auto;
margin-left: auto;
}
td{font-size:12px ;}
.lswz{
width: 300px;
height: 350px;
margin-top: 2px;
float: left;
}
.lswz h4,. lswz h1{ height:25px;
width:265px;
text-align:left;
line-height:1.8em;
padding-left:35px;
background:url(eshow /dd_bg.gif);
}
.lswz ul{ text-align:left; padding:4px; border-top:1px solid #DFDFDF; margin-top:2px}
.lswz a{border -bottom:1px dashed #DFDFDF;}
.books{
width: 175px;
height: 350px;
margin-top: 2px;
}
.books h2{
height:25px;
width:535px;
text-align:left;
padding-left:35px;
line-height:1.8em;
background:url(eshow/ books.gif);
}
.books ul{ text-align:left;}

.footer{
width: 1050px;
height: 100px;
background -color: #CCC;
margin-top: 0;
margin-right: 0px;
margin-bottom: 0px;
margin-left: 0px;
}
/**********************************************/
.main{
 clear:both;
 padding:8px;
 text-align:center;
}
/*第一种形式*/
#tabs0,#tabs1 {
 height: 260px;
 width: 238px;
 border: 1px solid #DFDFDF;
 background:#fff;
 margin-top:5px;
}
.menu0,.menu1{
 width: 238px;
 border-bottom: 1px solid #DFDFDF;
}
.menu0 li,.menu1 li{
 display:block;
 float: left;
 padding: 4px 0;
 width:80px;
 text-align: center;
 cursor:pointer;
 background: #FFFFff;
 border-right: 1px solid #DFDFDF;
}
.menu0 li.hover,.menu1 li.hover{
 background: url(eshow/xuanbg.jpg);
 color:#fff;
}
#main0 a,#main1 a{
   border-bottom:1px #d4d4d4 dashed;
}
#main0 ul,#main1 ul{
 display: none;
 text-align:left;
 line-height:1.4em;
}
#main0 ul.block,#main1 ul.block{
 display: block;
}
/******************************************/
.biaoti{width:100%; height:auto;margin-top:5px; float:left}
.biaoti h2{height:25px; background:#F0F0F0; padding-top:5px; font-size:13px;}
.container .footer ul li div {
font-family: Georgia, Times New Roman, Times, serif;
}

HTML 代码呢

HTML 代码呢

HTML 代码呢

引用楼主  的回复:
最近帮朋友修改网站,因为是初学div+css，所以不知道添加导航标题以后为什么会不显示出来，好像被遮盖了一样。
在文件css.css中应该怎么样修改导航菜单属性和值。
希望会的朋友能给我一些提示，代码我随后就贴上~~


css 的代码如下 ：
body{
   font-size:13px;
margin:0px;
padding:0px;
text……
html  代码：
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body,td,th {
color: #F00;
}
a {
font-weight: bold;
}
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<ul style="float:left; width:680px;"><li><a href="/index.asp">本站首页</a></li>

The width of ul here should be increased according to how many li you have. It is not static, for example, a li The width is 60px. Then every time you add a li, the 680 here will increase the width accordingly. Note that I am just giving an example of 60px. The specific width depends on the character width of 18px

Thank you, the problem has been successfully solved. But can I ask for advice again? After the menu title is modified. Why does it change to the original menu title style when I click on the link? I sincerely ask for advice. I have also looked for information, but I can’t find an entry point...