$(document).ready(function() { 
    $('#login').click(function() { 
		$.blockUI({ 
            message: $('#loginForm'), 
            css: {
				background: '#d4d4d4',
				width: '25%',
				height: '30%',
				top: '25%',
				left: '39%',
			} 
        }); 
		$('.blockOverlay').attr('title','Clicca per sbloccare').click($.unblockUI);
    }); 
});