var init = 0;
function mostrarLogin() {
	var loginDiv = $('loginDiv');
//	Effect.Fade(loginDiv);
	if(!init)
		loginDiv.hide();
	else {
		if(init%2) {
			
			Effect.Appear(loginDiv, { duration: 1.0 });
		} else {
			
			Effect.Fade(loginDiv, { duration: 1.0 });
		}
	}
	init++;

}