var jsAlert_timer_id = null;

function jsAlert(message, timeout){
	var e = document.getElementById('jsalert');
	e.style.left = (document.body.clientWidth - e.clientWidth) / 2 ;
	e.style.top = (document.body.clientHeight - e.clientHeight) / 2 + document.body.scrollTop;
	var m = document.getElementById('jsalert_message');
	m.innerHTML=message;
	e.style.visibility = "";
	if (jsAlert_timer_id != null ) window.clearInterval(jsAlert_timer_id);
	jsAlert_timer_id = window.setTimeout("jsAlertClose()",timeout);
}

function jsAlertClose(){
	var e = document.getElementById('jsalert');
	e.style.visibility = "hidden";
	if (jsAlert_timer_id != null ) window.clearInterval(jsAlert_timer_id);
}