treeajax.js

树形菜单

function showHide(id,root) {

	var el = document.getElementById(id);
	var bExpand = true;
	var images = el.getElementsByTagName("IMG");
	if (images[0].src.indexOf("minus.gif") != -1) {
		bExpand = false;
		images[0].src = "images/tree/plus.gif";
	} else {
		images[0].src = "images/tree/minus.gif";
	}
	var subs = el.lastChild;
	if (bExpand) {
		getChapterList(id,root);
		subs.style.display = "block";
	} else {
		subs.style.display = "none";
	}
}
var xmlHttp;

//创建XMLHttpRequest对象
function createXMLHttpRequest() {
	if (window.ActiveXObject) {
		xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
	} else {
		if (window.XMLHttpRequest) {
			xmlHttp = new XMLHttpRequest();
		}
	}
}	




function getChapterList(id,root) {
	createXMLHttpRequest();
	//var name = document.getElementById("name").value;
	var url = "getCategoryList?timeStamp=" + new Date().getTime();
	var queryString;
	if(root)
		queryString = "id=" +id.substring(4,id.length)+"&"+"root=yes";
	else
		queryString = "id=" + id;
		
	url = encodeURI(url + "&" + queryString);

	

	//url="../checkUser?timeStamp=2007-05-12&name=sdsdsds&pwd=123"
	xmlHttp.open("GET", url, true);
	xmlHttp.onreadystatechange = function(){
		if (xmlHttp.readyState == 4) {
			if (xmlHttp.status == 200) {
	            //自己定义的方法
				var el= document.getElementById(id);
				var subs = el.lastChild;
				var result= xmlHttp.responseText;
				subs.innerHTML=result;
			}
		}

	};
	xmlHttp.send(null);
}