/******************************************************************************
  supesite/x-sapce - ajax for ss/xs
  copyright 2001-2006 comsenz inc. (http://www.comsenz.com|http://www.maifou.net|http://www.yisence.com)
*******************************************************************************/

var xml_http_building_link = 'please wait, is to establish a connection...';
var xml_http_sending = 'please wait, is sending data...';
var xml_http_loading = 'please wait, we are receiving data...';
var xml_http_load_failed = 'communication failure, please try again refresh';
var xml_http_data_in_processed = 'communication success, the data being processed...';

function ajax(statusid, recvtype) {
	var aj = new object();
	if(document.getelementbyid(statusid)) {
		aj.statusid = document.getelementbyid(statusid);
	} else {
		var divelement = document.createelement("div");
		divelement.classname = "xweb-ajaxmsg";
		divelement.style.position = "fixed";
		divelement.style.right = "0";
		divelement.style.top = "0";
		divelement.style.background = "red";
		divelement.style.color = "#fff";
		divelement.style.lineheight = "2em";
		divelement.style.padding = "0 20px";
		divelement.id = statusid;
		document.body.appendchild(divelement);
		aj.statusid = divelement;
	}
	
	aj.targeturl = '';
	aj.sendstring = '';
	aj.recvtype = recvtype ? recvtype : 'html';//html xml
	aj.resulthandle = null;

	aj.createxmlhttprequest = function() {
		var request = false;
		if(window.xmlhttprequest) {
			request = new xmlhttprequest();
			if(request.overridemimetype) {
				request.overridemimetype('text/xml');
			}
		} else if(window.activexobject) {
			var versions = ['microsoft.xmlhttp', 'msxml.xmlhttp', 'microsoft.xmlhttp', 'msxml2.xmlhttp.7.0', 'msxml2.xmlhttp.6.0', 'msxml2.xmlhttp.5.0', 'msxml2.xmlhttp.4.0', 'msxml2.xmlhttp.3.0', 'msxml2.xmlhttp'];
			for(var i=0; i<versions.length; i++) {
				try {
					request = new activexobject(versions[i]);
					if(request) {
						return request;
					}
				} catch(e) {
					//alert(e.message);
				}
			}
		}
		return request;
	}

	aj.xmlhttprequest = aj.createxmlhttprequest();

	aj.processhandle = function() {
		aj.statusid.style.display = '';
		if(aj.xmlhttprequest.readystate == 1) {
			aj.statusid.innerhtml = xml_http_building_link;
		} else if(aj.xmlhttprequest.readystate == 2) {
			aj.statusid.innerhtml = xml_http_sending;
		} else if(aj.xmlhttprequest.readystate == 3) {
			aj.statusid.innerhtml = xml_http_loading;
		} else if(aj.xmlhttprequest.readystate == 4) {
			if(aj.xmlhttprequest.status == 200) {
				aj.statusid.style.display = 'none';
				if(aj.recvtype == 'html') {
					aj.resulthandle(aj.xmlhttprequest.responsetext);
				} else if(aj.recvtype == 'xml') {
					aj.resulthandle(aj.xmlhttprequest.responsexml);
				}
			} else {
				aj.statusid.innerhtml = xml_http_load_failed;
			}
		}
	}

	aj.get = function(targeturl, resulthandle) {
		aj.targeturl = targeturl;
		aj.xmlhttprequest.onreadystatechange = aj.processhandle;
		aj.resulthandle = resulthandle;
		if(window.xmlhttprequest) {
			aj.xmlhttprequest.open('get', aj.targeturl);
			aj.xmlhttprequest.send(null);
		} else {
	        aj.xmlhttprequest.open("get", targeturl, true);
	        aj.xmlhttprequest.send();
		}
	}

	aj.post = function(targeturl, sendstring, resulthandle) {
		aj.targeturl = targeturl;
		aj.sendstring = sendstring;
		aj.xmlhttprequest.onreadystatechange = aj.processhandle;
		aj.resulthandle = resulthandle;
		aj.xmlhttprequest.open('post', targeturl);
		aj.xmlhttprequest.setrequestheader('content-type', 'application/x-www-form-urlencoded');
		aj.xmlhttprequest.send(aj.sendstring);
	}
	return aj;
}