/* Copyright (c) 2006-2007 Mathias Bank (http://www.mathias-bank.de)
 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
 *
 * Version 2.1
 *
 * Thanks to
 * Hinnerk Ruemenapf - http://hinnerk.ruemenapf.de/ for bug reporting and fixing.
 * Tom Leonard for some improvements
 *
 * MODIFIED BY CHAD! Added the Url attribute type section
 *
 */
jQuery.fn.extend({
    /**
* Returns get parameters.
*
* If the desired param does not exist, null will be returned
*
* To get the document params:
* @example value = $(document).getUrlParam("paramName");
*
* To get the params of a html-attribut (uses src attribute)
* @example value = $('#imgLink').getUrlParam("paramName");
*/
    getUrlParam: function(strParamName){
        strParamName = escape(unescape(strParamName));

        var returnVal = new Array();
        var qString = null;

        if ($(this).attr("nodeName")=="#document") {
            //document-handler
            if (window.location.search.search(strParamName) > -1 ){

                qString = window.location.search.substr(1,window.location.search.length).split("&");
            }

        } else if (typeof $(this).attr("src") != 'undefined') {
            var strHref = $(this).attr("src");
            if ( strHref.indexOf("?") > -1 ){
                var strQueryString = strHref.substr(strHref.indexOf("?")+1);
                qString = strQueryString.split("&");
            }
        } else if (typeof $(this).attr("href") != 'undefined') {
            var strHref = $(this).attr("href");
            if ( strHref.indexOf("?") > -1 ){
                var strQueryString = strHref.substr(strHref.indexOf("?")+1);
                qString = strQueryString.split("&");
            }
        } else if (typeof $(this).attr("url") != 'undefined') {
            var strHref = $(this).attr("url");
            if ( strHref.indexOf("?") > -1 ){
                var strQueryString = strHref.substr(strHref.indexOf("?")+1);
                qString = strQueryString.split("&");
            }
        } else {
            return null;
        }

        if (qString==null) return null;

        for (var i=0;i<qString.length; i++){
            if (escape(unescape(qString[i].split("=")[0])) == strParamName){
                returnVal.push(qString[i].split("=")[1]);
            }

        }

        if (returnVal.length==0) return null;
        else if (returnVal.length==1) return returnVal[0];
        else return returnVal;
    }
});