Home  >  Article  >  Web Front-end  >  Why is there such a big gap between the first-level directories? _html/css_WEB-ITnose

Why is there such a big gap between the first-level directories? _html/css_WEB-ITnose

WBOY
WBOYOriginal
2016-06-24 11:51:111807browse

Click "User Management" in the first-level directory, expand the second-level directory, and find that there is a big gap between the last item in the second-level directory and "System Management". What's going on? Like:

Attach HTML code

<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>leftwindow</title><style type=text/css>#baseInfoManager{  width:180px;  height:100px;  }#baseInfoManager p{ height:30px; text-indent:20px; }#baseInfoManager p a{   display:block;   height:100%;   width:100%;   text-decoration:none;    line-height:30px;   font-family:Arial, Helvetica, sans-serif;   font-size:12px;}#baseInfoManager p a:hover{   height:100%;   width:100%;   color:#000;    text-decoration:none;    background:#dce7f0;}#baseInfoManager ul{   	margin-top:1px; 	width:100%; 	height:100%;}#baseInfoManager ul li{ 	width:180px; 	height:30px; 	list-style:none; 	line-height:30px; 	text-indent:40px; }#baseInfoManager ul li a{   float:left;   width:180px;   height:30px;   text-decoration:none;    font-family:Arial, Helvetica, sans-serif;   font-size:12px; }#baseInfoManager ul li a:hover{  width:180px;  height:30px;  color:#000;   text-decoration:none;   background:#dce7f0;}</style><SCRIPT language="javascript"> window.onload=function() {     var obtn=document.getElementById('btn');     var oul=document.getElementById('ul1');     obtn.onclick=function()  {    if(oul.style.display=='block')   {    oul.style.display='none';   }   else   {    oul.style.display='block';   }  }     };</SCRIPT></head><body bgcolor="#f3f8fc">  <div id="baseInfoManager">  <p id="btn"><a href="#" onClick="showSubMenu(1)">用户管理</a></p> <ul id="ul1" style="display:none;">    <li><a href="#" >aaa</a></li>    <li><a href="#" >bbb</a></li> </ul>  <p id="btn1"><a href="#" onClick="showSubMenu(2)">系统管理</a></p> <ul id="ul2" style="display:none;"> 	<li>ccc </li> 	<li>ddd </li> </ul> </div> </body></html>


Reply to discussion (solution)

margin

<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>leftwindow</title><style type=text/css>  *{margin: 0px;padding:0px;}#baseInfoManager{  width:180px;  height:100px;   }#baseInfoManager p{ height:30px; text-indent:20px;  clear:both;}#baseInfoManager p a{   display:block;   height:100%;   width:100%;   text-decoration:none;    line-height:30px;   font-family:Arial, Helvetica, sans-serif;   font-size:12px;}#baseInfoManager p a:hover{   height:100%;   width:100%;   color:#000;    text-decoration:none;    background:#dce7f0;} #baseInfoManager ul{       margin-top:1px;     width:100%;}#baseInfoManager ul li{     width:180px;     list-style:none;     line-height:30px;     text-indent:40px;  }#baseInfoManager ul li a{   float:left;   width:180px;   text-decoration:none;    font-family:Arial, Helvetica, sans-serif;   font-size:12px; }#baseInfoManager ul li a:hover{  width:180px;  color:#000;   text-decoration:none;   background:#dce7f0;}</style><SCRIPT language="javascript"> window.onload=function() {     var obtn=document.getElementById('btn');     var oul=document.getElementById('ul1');     obtn.onclick=function()  {     if(oul.style.display=='block')   {    oul.style.display='none';   }   else   {    oul.style.display='block';   }  }      };</SCRIPT></head> <body bgcolor="#f3f8fc">    <div id="baseInfoManager">   <p id="btn"><a href="#" onClick="showSubMenu(1)">用户管理</a></p> <ul id="ul1" style="display:none;">    <li><a href="#" >aaa</a></li>    <li><a href="#" >bbb</a></li> </ul>   <p id="btn1"><a href="#" onClick="showSubMenu(2)">系统管理</a></p> <ul id="ul2" style="display:none;">     <li>ccc </li>     <li>ddd </li> </ul> </div>  </body></html>

margin

<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>leftwindow</title><style type=text/css>  *{margin: 0px;padding:0px;}#baseInfoManager{  width:180px;  height:100px;   }#baseInfoManager p{ height:30px; text-indent:20px;  clear:both;}#baseInfoManager p a{   display:block;   height:100%;   width:100%;   text-decoration:none;    line-height:30px;   font-family:Arial, Helvetica, sans-serif;   font-size:12px;}#baseInfoManager p a:hover{   height:100%;   width:100%;   color:#000;    text-decoration:none;    background:#dce7f0;} #baseInfoManager ul{       margin-top:1px;     width:100%;}#baseInfoManager ul li{     width:180px;     list-style:none;     line-height:30px;     text-indent:40px;  }#baseInfoManager ul li a{   float:left;   width:180px;   text-decoration:none;    font-family:Arial, Helvetica, sans-serif;   font-size:12px; }#baseInfoManager ul li a:hover{  width:180px;  color:#000;   text-decoration:none;   background:#dce7f0;}</style><SCRIPT language="javascript"> window.onload=function() {     var obtn=document.getElementById('btn');     var oul=document.getElementById('ul1');     obtn.onclick=function()  {     if(oul.style.display=='block')   {    oul.style.display='none';   }   else   {    oul.style.display='block';   }  }      };</SCRIPT></head> <body bgcolor="#f3f8fc">    <div id="baseInfoManager">   <p id="btn"><a href="#" onClick="showSubMenu(1)">用户管理</a></p> <ul id="ul1" style="display:none;">    <li><a href="#" >aaa</a></li>    <li><a href="#" >bbb</a></li> </ul>   <p id="btn1"><a href="#" onClick="showSubMenu(2)">系统管理</a></p> <ul id="ul2" style="display:none;">     <li>ccc </li>     <li>ddd </li> </ul> </div>  </body></html>


Thank you!
Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn