vs2005页面调用jQuery在IE8报：对象不支持此属性或方法
如题，
<link rel="stylesheet" href="demoStyle/demo.css" type="text/css"/> <link rel="stylesheet" href="ztreeStyle/ztreeStyle.css" type="text/css"/> <script type="text/javascript" src="jquery-1.4.2.js"></script> <script type="text/javascript" src="jquery.ztree-2.6.js"></script> <script type="text/javascript" src="asyncData/demoData.js"></script> <script type="text/javascript" src="demoTools.js"></script> <script language="JavaScript"> var ztree1, ztree2; var setting; setting = { editable: true, edit_renameBtn:false, edit_removeBtn:false, dragCopy: true, dragMove: true, callback: { click: ztreeOnClick, drop: ztreeOnDrop } }; $(document).ready(function(){ reloadtree(); }); var preSelectedNode1; var preSelectedNode2; function ztreeOnClick(event, treeId, treeNode) { if (treeId=="treeDemo") { if (preSelectedNode1 == treeNode) { ztree1.cancelSelectedNode(); preSelectedNode1 = null; } else { preSelectedNode1 = treeNode; } } else { if (preSelectedNode2 == treeNode) { ztree2.cancelSelectedNode(); preSelectedNode2 = null; } else { preSelectedNode2 = treeNode; } } } function ztreeOnDrop(event, treeId, treeNode, targetNode, moveType) { preSelectedNode1 = ztree1.getSelectedNode(); preSelectedNode2 = ztree2.getSelectedNode(); } function movetreeL2R() { movetreeNode(ztree1, ztree2); } function movetreeR2L() { movetreeNode(ztree2, ztree1); } function movetreeNode(srctree, targettree) { var srcNode = srctree.getSelectedNode(); if (!srcNode) { alert("请先选择需要移动的节点！"); return; } var targetNode = targettree.getSelectedNode(); srctree.removeNode(srcNode); targettree.addNodes(targetNode, [srcNode]); targettree.selectNode(srcNode); } function reloadtree() { ztree1 = $("#treeDemo").ztree(setting, zNodes); ztree2 = $("#treeDemo2").ztree(setting, zNodes); } </script>