/*
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2007 Bharat Mediratta
 *
 * This program 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; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program 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 program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
 */

/* Cross-browser event handling, by Scott Andrew */
function addEvent(element, eventType, lamdaFunction, useCapture) {
    if (element.addEventListener) {
	element.addEventListener(eventType, lamdaFunction, useCapture);
	return true;
    } else if (element.attachEvent) {
	var r = element.attachEvent('on' + eventType, lamdaFunction);
	return r;
    } else {
	return false;
    }
}

/*
 * Cross-browser style extraction, from the JavaScript & DHTML Cookbook
 * <http://www.oreillynet.com/pub/a/javascript/excerpt/JSDHTMLCkbk_chap5/index5.html>
 */
function getElementStyle(elementID, CssStyleProperty) {
    var element = document.getElementById(elementID);
    if (element.currentStyle) {
	return element.currentStyle[toCamelCase(CssStyleProperty)];
    } else if (window.getComputedStyle) {
	var compStyle = window.getComputedStyle(element, '');
	return compStyle.getPropertyValue(CssStyleProperty);
    } else {
	return '';
    }
}

/*
 * CamelCases CSS property names.
 * From <http://dhtmlkitchen.com/learn/js/setstyle/index4.jsp>
 */
function toCamelCase(CssProperty) {
    var stringArray = CssProperty.toLowerCase().split('-');
    if (stringArray.length == 1) {
	return stringArray[0];
    }
    var ret = (CssProperty.indexOf("-") == 0)
	      ? stringArray[0].charAt(0).toUpperCase() + stringArray[0].substring(1)
	      : stringArray[0];
    for (var i = 1; i < stringArray.length; i++) {
	var s = stringArray[i];
	ret += s.charAt(0).toUpperCase() + s.substring(1);
    }
    return ret;
}