半透明tooltip的实现
制作半透明的tooltip 无非就是2个div重叠实现的，下面的例子如下：
<html> <head> <meta charset="UTF-8" /> <title>QUnit Test Suite</title> <link rel="stylesheet" href="tooltip.css" type="text/css" media="screen"> <script type="text/javascript" src="../../lib/jquery/jquery-1.4.2.js"> </script> <script type="text/javascript"> $(function(){ var hideDelay = 500; var currentID; var hideTimer = null; var container = $('<div name="code">.chart-panel {Z-INDEX: 99999;LEFT: 0%;MARGIN-LEFT: 0px;ZOOM: 1;POSITION: absolute;TOP: 20%;Display: none}.chart-spanBG {background-color: #FFFFCC;POSITION: absolute;FILTER: alpha(opacity:50);opacity: 0.50;width: 100%;height: 100%}.chart-span {width: auto;height: auto;margin: auto;POSITION: relative}.chart-panel .container {Z-INDEX: 2;BORDER-RIGHT: #999 1px solid;BORDER-TOP: #999 1px solid;MARGIN: 0px;OVERFLOW: hidden;BORDER-LEFT: #999 1px solid;BORDER-BOTTOM: #999 1px solid;POSITION: relative}.chart-panel H5 {FONT-WEIGHT: normal;font-size: 10px;margin-left: 5px;margin-right: 5px;white-space: nowrap;font-family: Verdana, Arial, Helvetica, sans-serif;color: #000000}?
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