function showAuth(){
	var overl = document.getElementById("overlay");
	var authf = document.getElementById("auth");
	var auth_bg = document.getElementById("auth_bg");
	if(window.attachEvent) {
		overl.style.width = document.getElementsByTagName("body")[0].clientWidth+40;
		overl.style.height = document.getElementsByTagName("body")[0].clientHeight+40;
	} else {
		overl.style.width = document.width;
		overl.style.height = document.height;
	}
	overl.style.display = 'block';
	authf.style.display = 'block';
	auth_bg.style.display = 'block';
	return false;
}
function hideAuth(){
	document.getElementById("overlay").style.display="none";
	document.getElementById("auth").style.display="none";
	document.getElementById("auth_bg").style.display="none";
	return false;
}