// JavaScript Document
function ajax(){
	var xmlHttp;
	var divid;
	var root = null;

	var createXMLHttp = function(){
		if (window.XMLHttpRequest){
			xmlHttp = new XMLHttpRequest();
		}else if (window.ActiveXObject){
			xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
		}
	}

	var createQueryString = function(num,cnum){
		return "num=" + num + "&cnum=" + cnum;
	}

	this.top_listCase = function(num,url,divName,cnum){
		createXMLHttp();
		divid = divName;
		xmlHttp.onreadystatechange = function(){
			if (xmlHttp.readyState == 1){
				document.getElementById(divid).innerHTML = "讀取資料中...";
			}
			else if (xmlHttp.readyState == 2){
				document.getElementById(divid).innerHTML = "資料下載完成,處理中...";
			}
			else if (xmlHttp.readyState == 3){
				document.getElementById(divid).innerHTML = "資訊交換中...";
			}
			else if (xmlHttp.readyState == 4){
				if (xmlHttp.status == 200){
					document.getElementById(divid).innerHTML = xmlHttp.responseText;
				}
			}
		};
		xmlHttp.open("POST", url);
		xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
		xmlHttp.send(createQueryString(num,cnum));
	};
}