function request(url, loc, sendVars, var1) {
	//document.getElementById(loc).innerHTML="<img src=\"/img/loading.gif\" />";
	http_request = false;
	if(window.XMLHttpRequest) {
		http_request = new XMLHttpRequest();
		if(http_request.overrideMineType){
			http_request.overrideMineType('text/html');
		}
	}
	else if (window.ActiveXObject) {
		http_request = new ActiveXObject('Microsoft.XMLHTTP');
	}
	if(!http_request){
		alert('cannot connect!');
		return false;
	}
	http_request.onreadystatechange = function() { processReq(loc, var1) };
	http_request.open('POST', url+'.php', true);
	http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	http_request.send(sendVars);
} 
function processReq(loc, var1) {
	var area;
	area = document.getElementById(loc);
	if(http_request.readyState == 4){
		if(http_request.status == 200){
			if(var1=="points"){
				eval(http_request.responseText);
			}
			else {
				area.innerHTML = http_request.responseText;
			}
		}
		else {
			alert('error!'+http_request.status);
		}
	}
}