/*
 * fx.js
 *
 * Copyright (C) 2006 - OS3 srl - http://www.os3.it
 *
 * Written by: Fabio Rotondo - fabio.rotondo@os3.it
 *
 * This is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation;
 * version 2 of the License ONLY.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this software; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * NOTE: this is the GPL version of the library. If you want to include this 
 *       library inside a CLOSED SOURCE / PROPRIETARY software, you need 
 *       to purchase a COMMERCIAL LICENSE. See http://www.os3.it/license/
 *       for more info.
 */

// liwe.fx = {};	// Defined in liwe.js

liwe.fx.priv = {};	// Private methods

// PUBLIC: liwe.fx.set_opacity
//
// Setta la trasparenza dell'oggetto ``e``
// con il valore di alpha ``val``.
// ``val`` deve essere compreso tra 0 e 100
//
// Restituisce il valore di ``val`` assegnato all'oggetto
liwe.fx.set_opacity = function ( e, val )
{
        if ( val > 100 ) val = 100;
        if ( val < 0 ) val = 0;

        if ( e.filters )
        {
                if ( ! e.filters.alpha ) e.style.filter = "alpha(opacity=" + val + ")";
                e.filters.alpha.opacity = val;
        } else {
		e.style.MozOpacity = val / 100;
		e.style.opacity = val / 100;
	}

	return val;
};