var http_request = false;
var loading,update,result,divid,isIE,pupdate;
function send_request(url) {
	http_request = false;
	if(window.XMLHttpRequest) { //Mozilla
        isIE=false;
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
		}
	}else if (window.ActiveXObject) { // IE
        isIE=true;
	  try {
		http_request = new ActiveXObject("Msxml2.XMLHTTP");
	  } catch (e) {
		try {
			http_request = new ActiveXObject("Microsoft.XMLHTTP");
		} catch (e) {}
	 }
   }
   if (!http_request) {
      document.getElementById(obj).innerHTML="";
      return false;
   }
	http_request.onreadystatechange = processRequest;
	http_request.open("post", url, true);
	http_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	http_request.send(null);
}

function processRequest() {
   if (http_request.readyState == 4) {
     if (http_request.status == 200) {
        if(update){
	        document.getElementById(update).innerHTML=result;
        }
        if(loading){
            document.getElementById(loading).style.display='none';
        }
        if(pupdate){
            document.getElementById(pupdate).innerHTML=http_request.responseText;
        }
     } else {
       alert("载入信息错误。");
   }
  }
}