function $(ids){return document.getElementById(ids)}

function diqu_on(duixiang){	
		//遍历所有a，设置样式为 left_diqu_a
		alist = $('left_diqu').getElementsByTagName("span");
		for(i=0 ;i<alist.length;i++){alist[i].className="left_diqu_a";}

		//将当前的样式设置为 left_diqu_hover
		duixiang.className="left_diqu_hover";		
		//写入菜单内容
		$('left_dizhi').innerHTML=$("C" + duixiang.id).innerHTML;
}

function dizhi_on(duixiang){	
		//遍历所有a，设置样式为 left_diqu_a
		alist = $('left_dizhi').getElementsByTagName("li");
		for(i=0 ;i<alist.length;i++)
		{
		   alist[i].className="left_dizhi_a";
		}
		//将当前的样式设置为 left_diqu_hover
		duixiang.className="left_dizhi_hover";
}

function on_caidan_item(idstrs){	
		$('cdnr1').style.display="none";
		$('cdnr2').style.display="none";
		$('cdnr3').style.display="none";
		$('cdnr4').style.display="none";
		$('cditem1').className="caidan_items";
		$('cditem2').className="caidan_items";
		$('cditem3').className="caidan_items";
		$('cditem4').className="caidan_items";
		
		$('cdnr' + idstrs).style.display="";
		$('cditem' + idstrs).className="caidan_item";
}



//----------------------------------------------------------AJAX远程读取

	var ajax_mubiao,tuweifu;
	function AjaxGet(mubiaodiv,url) {
		
		ajax_mubiao = $(mubiaodiv);
		
		url = "ajax/" + url;
		
		tuweifu = false;
		
		//开始初始化XMLHttpRequest对象
		if(window.XMLHttpRequest) { //Mozilla 浏览器
			tuweifu = new XMLHttpRequest();
			if (tuweifu.overrideMimeType) {//设置MiME类别
				tuweifu.overrideMimeType("text/xml");
			}
		}
		else if (window.ActiveXObject) { // IE浏览器
			try {
				tuweifu = new ActiveXObject("Msxml2.XMLHTTP");
			}catch (e){
				try {
					tuweifu = new ActiveXObject("Microsoft.XMLHTTP");
				}catch (e) {}
			}
		}
		
		if (!tuweifu) { // 异常，创建对象实例失败
			window.alert("对不起，您的浏览器不支持AJAX技术，因此您无法正确读取新的内容。建议您升级您的浏览器版本。");
			ajax_mubiao.innerHTML = "您的浏览器不支持AJAX技术，建议您升级您的浏览器版本。";
			return false;
		}
		
		tuweifu.onreadystatechange = processRequest;
		tuweifu.open("GET",url + "&a=" + Math.floor(Math.random()*24), true); 
		tuweifu.send(null);
	}
	
	// 处理返回信息的函数
    function processRequest() {
		//正在载入
		if (tuweifu.readyState == 1){
			ajax_mubiao.innerHTML = "<div class='tishi_" + ajax_mubiao.id + " zairu'></div>";	
			
		}

        if (tuweifu.readyState == 4) { // 判断对象状态
            if (tuweifu.status == 200) { // 信息已经成功返回，开始处理信息
			
					var zhis = tuweifu.responseText.split('|');
					eval(zhis[0]);
					ajax_mubiao.innerHTML =zhis[1];
					
            } else { //页面不正常
					ajax_mubiao.innerHTML ="<div class='tishi_" + ajax_mubiao.id + " cuowu'></div>";		
            }
        }
    }
	
//----------------------------------------------------------AJAX远程读取结束