function chksession(){
	$.ajax( {
		type : "POST",
		url : "?",
		data : "p=chksession",
		beforeSend : function(httpreq) {
			httpreq.setRequestHeader("Content-Transfer-Encoding", "UTF-8");
		},
		success : function(data) {
			if(data == "fail"){
				window.location = "/?p=";
			}
			else{
				return true;
			}
		}
	});
}