function doLogin(sBase, bOnlyCheck) {
	var check = bOnlyCheck ? true : false; 
	var bLogin = window.showModalDialog
	(
		sBase + "authorization/login.html",
		check,
		"dialogHeight:140px; dialogWidth:305px; " +
		"border:solid; status:no; help:no; maximize:no; minimize:no;"
	);
	return bLogin || false;
}

function doRegister(sBase) {
	var oPoint = new Object();
	oPoint.x = window.screen.availWidth/2; 
	oPoint.y = window.screen.availHeight/2; 
	var bRegister = window.showModalDialog
	(
		sBase + "authorization/register.html",
		oPoint, 
		"dialogHeight:140px; dialogWidth:305px; " +
		"dialogTop:" + (oPoint.y - 70) + "px; " + 
		"dialogLeft:" + (oPoint.x - 150) + "px; " +
		"border:thin; status:no; help:no; maximize:no; minimize:no;"
	);
	return bRegister || false;
}