SOURCE

console 命令行工具 X clear

                    
>
console
// ===========================
function go() {
  location = document.forms[0].gowhere.value
}
// ===========================
function showmenu(elmnt) {
  document.getElementById(elmnt).style.visibility = "visible"
}
function hidemenu(elmnt) {
  document.getElementById(elmnt).style.visibility = "hidden"
}
// ===========================
function gettip(txt) {
  document.getElementById('tip').innerHTML = txt
}
function reset() {
  document.getElementById('tip').innerHTML = " "
}
// ================================
function gettips(image)
{
document.getElementById('tips').innerHTML="<img src='" + image + "' />"
}
function resets()
{
document.getElementById('tips').innerHTML=" "
}
// ==================================
function cursor(text){
  trail.innerHTML=text
  trail.style.visibility="visible"
  trail.style.position="absolute"
  trail.style.left=event.clientX+10
  trail.style.top=event.clientY
}
function hidecursor(){
	trail.style.visibility="hidden"
}
function cursor2(img){
  trail2.innerHTML="<img src='" + img + "' />"
  trail2.style.visibility="visible"
  trail2.style.position="absolute"
  trail2.style.left=event.clientX+10
  trail2.style.top=event.clientY
}
function hidecursor2(){
	trail2.style.visibility="hidden"
}
// ====================================

var i=-135
var intHide
var speed=3
function showmenu()
{
clearInterval(intHide)
intShow=setInterval("show()",10)
}
function hidemenu()
{
clearInterval(intShow)
intHide=setInterval("hide()",10)
}
function show()
{
if (i<-12)
	{
	i=i+speed
	document.getElementById('myMenu').style.left=i
	}
}
function hide()
{
if (i>-135)
	{
	i=i-speed
	document.getElementById('myMenu').style.left=i
	}
}
<form>
  <select id="gowhere" onchange="go()">
    <option>
      -Select location-
    </option>
    <option value="http://baidu.com">
      百度
    </option>
    <option value="https://codepen.io/">
      CodePen
    </option>
    <option value="http://jsrun.pro/">
      JSRun在线编辑器
    </option>
  </select>
</form>
<!-- ==================== -->
<br />
<table width="100%">
  <tr bgcolor="#FF8080">
    <td onmouseover="showmenu('tutorials')" onmouseout="hidemenu('tutorials')">
      <a href="http://baidu.com">
        网址
      </a>
      <br />
      <table class="menu" id="tutorials" width="120">
        <tr>
          <td class="menu">
            <a href="http://baidu.com">
              baidu
            </a>
          </td>
        </tr>
        <tr>
          <td class="menu">
            <a href="https://codepen.io/">
              CodePen
            </a>
          </td>
        </tr>
        <tr>
          <td class="menu">
            <a href="http://jsrun.pro/">
              JSRun在线编辑器
            </a>
          </td>
        </tr>
      </table>
    </td>
    <td onmouseover="showmenu('scripting')" onmouseout="hidemenu('scripting')">
      <a href="http://baidu.com">
        网址
      </a>
      <br />
      <table class="menu" id="scripting" width="120">
        <tr>
          <td class="menu">
            <a href="http://baidu.com">
              baidu
            </a>
          </td>
        </tr>
        <tr>
          <td class="menu">
            <a href="https://codepen.io/">
              CodePen
            </a>
          </td>
        </tr>
        <tr>
          <td class="menu">
            <a href="http://jsrun.pro/">
              JSRun在线编辑器
            </a>
          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<!-- ==================== -->
<br />
<table width="400px">
  <tr>
    <th>
      <a href="http://www.w3school.com.cn" onmouseover="gettip('W3School is the best Web Developers resource on the Web')"
      onmouseout="reset()">
        W3School.com.cn
      </a>
    </th>
    <td rowspan="3" id="tip">
    </td>
  </tr>
  <tr>
    <th>
      <a href="http://www.microsoft.com" onmouseover="gettip('Internet Explorer is winning the browser war')"
      onmouseout="reset()">
        Internet Explorer
      </a>
    </th>
  </tr>
  <tr>
    <th>
      <a href="http://my.netscape.com" onmouseover="gettip('The Navigator is Netscapes browser tribute to web surfers')"
      onmouseout="reset()">
        Netscape Navigator
      </a>
    </th>
  </tr>
</table>
<br />
<!-- ==================== -->
<table width="400px">
  <tr>
    <th>
      <a href="/index.html" 
      onmouseover="gettips('https://www.w3school.com.cn/i/w3school_logo_black.gif')"
      onmouseout="resets()">W3School.com.cn</a>
    </th>
    <td rowspan="3" id="tips" align="center" valign="center"> </td>
  </tr>
  <tr>
    <th>
      <a href="http://www.microsoft.com"
      onmouseover="gettips('https://img-prod-cms-rt-microsoft-com.akamaized.net/cms/api/am/imageFileData/RE1Mu3b?ver=5c31')"
      onmouseout="resets()">Internet Explorer</a>
    </th>
  </tr>
  <tr>
    <th>
        <a href="http://my.netscape.com"
        onmouseover="gettips('http://my.netscape.com/favicon.ico')"
        onmouseout="resets()">Netscape Navigator</a>
    </th>
  </tr>
</table>
<br />
<!-- ============================================= -->
<a href="http://my.netscape.com/favicon.ico" class="cursorA" onmousemove="cursor('访问 Netscape Navigator')" onmouseout="hidecursor()">Netscape Navigator</a><br />
<a href="http://www.altavista.com" class="cursorA" onmousemove="cursor('转到 AltaVista')" onmouseout="hidecursor()">AltaVista</a><br />
<a href="http://www.yahoo.com" class="cursorA" onmousemove="cursor('使用 Yahoo 进行搜索!')" onmouseout="hidecursor()">Yahoo!</a>
<span id="trail" style="visibility:hidden">Hello</span>
<br />
<div style="position: relative;">
  <a href="/index.html" onmousemove="cursor2('https://www.w3school.com.cn/i/w3school_logo_white.gif')" onmouseout="hidecursor2()">W3School.com.cn</a><br />
  <a href="http://www.altavista.com" onmousemove="cursor2('https://www.w3school.com.cn/i/eg_altavistalink.gif')" onmouseout="hidecursor2()">AltaVista</a><br />
  <a href="http://www.yahoo.com" onmousemove="cursor2('https://www.w3school.com.cn/i/eg_yahoo.gif')" onmouseout="hidecursor2()">Yahoo!</a><br />
  <div id="trail2" style="visibility:hidden">Hello</div>  
</div>
<!-- ============================ -->
<table id="myMenu" class="myMenu" width="150" onmouseover="showmenu()" onmouseout="hidemenu()">
  <tr>
    <td class="menu"><a href="/index.html">HOME</a></td>
    <td rowspan="5" align="center" bgcolor="#FF8080">M<br />E<br />N<br />U</td>
  </tr>
  <tr>
    <td class="menu"><a href="/asp/index.asp">ASP</a></td>
  </tr>
  <tr>
    <td class="menu"><a href="/js/index.asp">JavaScript</a></td>
  </tr>
  <tr>
    <td class="menu"><a href="/dhtml/index.asp">DHTML</a></td>
  </tr>
  <tr>
    <td class="menu"><a href="/vbscript/index.asp">VBScript</a></td>
</tr>
</table>
body {
  font-family: arial;
}

a {
  color: black;
  text-decoration: none;
  font: bold
}

a:hover {
  color: #606060
}

td.menu {
  background: lightblue
}

table.menu {
  font-size: 100%;
  position: absolute;
  visibility: hidden;
}

table {
  background: black;
}

a {
  text-decoration: none;
  color: #000000;
}

th {
  width: 180px;
  background: #FF8080;
}

td {
  font: bold;
  background: #ADD8E6;
}
.cursorA{
  color: #afafaf;
}
/* ======================= */
body{font-family:arial;}
a{color:black;text-decoration:none;font:bold}
a:hover{color:#606060}
td.menu{background:lightblue}

table.myMenu
{
  background:black;
  position:relative;
  font: bold 80% arial;
  top:0px;
  left:-135px;
}