/**
* @fileoverview Loads generic modules required for all widgets.
*
* <pre>
* Copyright (c) 2004-2006 by Zapatec, Inc.
* http://www.zapatec.com
* 1700 MLK Way, Berkeley, California,
* 94709, U.S.A.
* All rights reserved.
* </pre>
*/

/* $Id: zapatec.js 4908 2006-10-25 15:19:32Z alex $ */

if (typeof Zapatec == 'undefined') {
    /**
    * Namespace definition.
    * @constructor
    */
    Zapatec = function() {};
}

/**
* Zapatec Suite version.
* @private
*/
Zapatec.version = '2.1';

/**
* Path to main Zapatec script.
* @private
*/
Zapatec.zapatecPath = function() {
    // Get all script elements
    var arrScripts = document.getElementsByTagName('script');
    // Find the script in the list
    for (var iScript = arrScripts.length - 1; iScript >= 0; iScript--) {
        var strSrc = arrScripts[iScript].getAttribute('src');
        if (!strSrc) {
            continue;
        }
        var arrTokens = strSrc.split('/');
        // Remove last token
        var strLastToken;
        if (Array.prototype.pop) {
            strLastToken = arrTokens.pop();
        } else {
            // IE 5
            strLastToken = arrTokens[arrTokens.length - 1];
            arrTokens.length -= 1;
        }
        if (strLastToken == 'zapatec.js') {
            return arrTokens.length ? arrTokens.join('/') + '/' : '';
        }
    }
    // Not found
    return '';
} ();

// For backward compatibility
if (Zapatec.version == '2.1.comp') {
    Zapatec.zapatecPath = Zapatec.zapatecPath.replace(/utils\/$/, '../utils/');
}

/**
* Simply writes script tag to the document.
*
* <pre>
* If special Zapatec.doNotInclude flag is set, this function does nothing.
* </pre>
*
* @private
* @param {string} strSrc Src attribute value of the script element
* @param {string} strId Optional. Id of the script element
*/
Zapatec.include = function(strSrc, strId) {
    // Check flag
    if (Zapatec.doNotInclude) {
        return;
    }
    // Include file
    document.write('<script type="text/javascript" src="' +
    strSrc + (typeof strId == 'string' ? '" id="' + strId : '') + '"></script>');
};

// Include required scripts
Zapatec.include(Zapatec.zapatecPath + 'utils.js', 'Zapatec.Utils');
Zapatec.include(Zapatec.zapatecPath + 'zpeventdriven.js', 'Zapatec.EventDriven');
Zapatec.include(Zapatec.zapatecPath + 'transport.js', 'Zapatec.Transport');
Zapatec.include(Zapatec.zapatecPath + 'zpwidget.js', 'Zapatec.Widget');