var http_request=false;
var g_container;
function makeRequest(container,url,queryString) {
    http_request=false;
    g_container=container;
	if(window.XMLHttpRequest){//Mozilla浏览器
	 http_request=new XMLHttpRequest();
//	 if(http_request.overrideMimeType){//设置MIME类别
//	   http_request.overrideMimeType("text/xml");
//	 }
	}
	else if(window.ActiveXObject){//IE浏览器
	 try{
	  http_request=new ActiveXObject("Msxml2.XMLHttp");
	 }catch(e){
	  try{
	  http_request=new ActiveXobject("Microsoft.XMLHttp");
	  }catch(e){}
	 }
    }
	if(!http_request){//异常，创建对象实例失败
	 window.alert("创建XMLHttp对象失败！");
	 return false;
	}
	http_request.onreadystatechange=getRequest;
	http_request.open('GET', url+queryString, true);
	http_request.send(null);
}
function getRequest() {
	if(http_request.readyState==4) {
		if(http_request.status==200) {
          //  alert(http_request.responseText);
			document.getElementById(g_container).innerHTML =  http_request.responseText;
		}
	}
}

function get_pre_month(year,month) {
 //   alert(month);
    var url = 'date.php';
	var pars = '?y='+year+'&m='+month;

    makeRequest( 'calendar', url, pars);


}

function get_next_month(year,month) {
    var url = 'date.php';
	var pars = '?y='+year+'&m='+month;

    makeRequest( 'calendar', url, pars);
}

function get_month()
{
    var url = 'date.php';
	var pars = '?y=-1&m=-1';
	makeRequest('calendar',url,pars);
}