JQUERY树，超简单，自带载入jQuery库

var oriData = [
                {myId:0,myParent:null,myTitle:'text0'},
                {myId:1,myParent:0,myTitle:'text1'},
                {myId:2,myParent:0,myTitle:'text2'},
                {myId:3,myParent:1,myTitle:'text3'},
                {myId:4,myParent:1,myTitle:'text4'},
                {myId:5,myParent:3,myTitle:'text5'},
                {myId:6,myParent:3,myTitle:'text6'},
                {myId:7,myParent:4,myTitle:'text7'}
            ];

            var scpt = document.createElement("script");
            scpt.onload = scpt.onreadystatechange = function() {
                if(this.readyState && this.readyState.toLowerCase() != "loaded") {
                    return;
                }
                jQuery.noConflict();
                (function($) {
                    function organizeTree(data,idKey,parentKey) {
        				var tmp = {};
        				$(data).each(function() {
        					tmp[this[idKey]]=this;
        				});
        				var root;
        				$(data).each(function () {
        					if(this.__parentNode = tmp[this[parentKey]]) {
        						(this.__parentNode.__childNodes||(this.__parentNode.__childNodes=[])).push(this);
        					} else {
        						root = this;
        					}
        				});
        				return root;
        			}
        			function createTree(data,offset,titleKey,prepend1,prepend2,prepend3) {
        				offset = offset||20;
        				titleKey = titleKey || 'title';
        				var tmp = $("
");
        				var children = data.__childNodes||[];
        				var text = (data[titleKey]||"").valueOf();
        				var titleLayer = $("
").appendTo(tmp).html(children.length?prepend1+text:prepend3+text)
        					.css("cursor","pointer").attr("isTitle","true").css("line-height","20px");
        				var subLayer = $("
").css("margin-left",offset+"px").appendTo(tmp);
        				$(children).each(function() {
        					createTree(this,offset,titleKey,prepend1,prepend2,prepend3).appendTo(subLayer);
        				});
        				if(children.length) {
        					titleLayer.toggle(function() {
        						titleLayer.html(prepend2+text);
        						subLayer.hide("fast");
        					},function() {
        						titleLayer.html(prepend1+text);
        						subLayer.show("fast");
        					});
        				};
        				return tmp;
        			}
        			$(function() {
        				var root = organizeTree(oriData,'myId','myParent');
        				createTree(root,20,
                            'myTitle',"",
                            "",""
                        ).appendTo(document.body);
        			});
                })(jQuery);
            }
            scpt.src="http://code.jquery.com/jquery-1.5.min.js";
            document.body.appendChild(scpt);

我贴个能立竿见影看到效果的，大家打开浏览器控制台，把上面代码贴进去执行即可（什么？没有控制台？IE8 F12,chrome ctrl+shift+j，如果还没有，那就算了）
如果chrome提示恶意网站，可能是因为图床的网站有问题，但是引用的图肯定没问题的。