[导入]DIV+js实现Tree

tree.htm

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
   <title></title>
   <meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
   <meta name="ProgId" content="VisualStudio.HTML">
   <meta name="Originator" content="Microsoft Visual Studio .NET 7.1">
   <link type="text/css" href="css/tree.css" rel="styles