function onTreeViewClick(evt) {
    evt = evt || window.event;
    var obj = (evt.target) ? evt.target : evt.srcElement;
    if (obj.tagName == "INPUT" && obj.type == "checkbox") {
        //var node = obj.parentNode.parentNode.parentNode.parentNode.nextSibling;
        //               TD         TR         TBODY      TABLE      DIV( 子节点的容器)
        //alert(obj.parentNode.parentNode.parentNode.tagName);
        var node = document.getElementById(obj.id.replace("CheckBox", "Nodes"));
        var nodes;
        if (node) {
            nodes = node.getElementsByTagName("INPUT");
            for (var j = 0 ; j < nodes.length ; j++) {
                if (nodes[j].type == "checkbox") {
                    nodes[j].checked = obj.checked;
                }
            }
        }
    }
}