Js点击弹出下拉菜单效果实例

复制代码 代码如下:

  <STYLE type=text/css>

  .menu { BORDER-RIGHT: #006080 2px solid; BORDER-TOP: #80e0ff 2px solid; LEFT: 0px; VISIBILITY: hidden; BORDER-LEFT: #80e0ff 2px solid; BORDER-BOTTOM: #006080 2px solid; POSITION: absolute; TOP: 0px; BACKGROUND-COLOR: #40a0c0 }

  A.menuItem { BORDER-RIGHT: #000000 0px solid; PADDING-RIGHT: 12px; BORDER-TOP: #000000 0px solid; DISPLAY: block; PADDING-LEFT: 8px; FONT-WEIGHT: bold; FONT-SIZE: 8pt; PADDING-BOTTOM: 2px; BORDER-LEFT: #000000 0px solid; CURSOR: default; COLOR: #ffffff; PADDING-TOP: 2px; BORDER-BOTTOM: #000000 0px solid; FONT-FAMILY: MS Sans Serif, Arial, Tahoma, sans-serif; TEXT-DECORATION: none }

  A.menuItem:hover { COLOR: #ffff00; BACKGROUND-COLOR: #004060 }

  </STYLE>

  <DIV class=menu id=myMenu><A class=menuItem

  href="http://www.glzy8.com">管理资源吧</A> <A class=menuItem

  href="http://www.baidu.com">百度</A> <A class=menuItem

  href="">网 易</A> <A class=menuItem

  href="">江苏音符</A> <A class=menuItem

  href="">央视国际</A> </DIV>

  <P><font onclick="openMenu(event, 'myMenu');return false;">点击打开菜单</font></P>

  <SCRIPT type=text/javascript>

  document.getElementById("myMenu").onmouseout = closeMenu;

  function openMenu(event, id) {

  var el, x, y;

  el = document.getElementById(id);

  if (window.event) {

  x = window.event.clientX + document.documentElement.scrollLeft

  + document.body.scrollLeft;

  y = window.event.clientY + document.documentElement.scrollTop +

  + document.body.scrollTop;

  }

  else {

  x = event.clientX + window.scrollX;

  y = event.clientY + window.scrollY;

  }

  x -= 2; y -= 2;

  el.style.left = x + "px";

  el.style.top = y + "px";

  el.style.visibility = "visible";

  }

  function closeMenu(event) {

  var current, related;

  if (window.event) {

  current = this;

  related = window.event.toElement;

  }

  else {

  current = event.currentTarget;

  related = event.relatedTarget;

  }

  if (current != related && !contains(current, related))

  current.style.visibility = "hidden";

  }

  function contains(a, b) {

  // Return true if node a contains node b.

  while (b.parentNode)

  if ((b = b.parentNode) == a)

  return true;

  return false;

  }

  </SCRIPT> </td>

  </tr>

  </table>