/************************************************************************************************************
Ajax dynamic content
Copyright (C) 2006  DTHMLGoodies.com, Alf Magne Kalleland

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

Dhtmlgoodies.com., hereby disclaims all copyright interest in this script
written by Alf Magne Kalleland.

Alf Magne Kalleland, 2006
Owner of DHTMLgoodies.com


************************************************************************************************************/        

var enableCache = true;
var jsCache = new Array();

var dynamicContent_ajaxObjects = new Array();

function ajax_showContent(divId,ajaxIndex,url)
{
        var targetObj = document.getElementById(divId);
        targetObj.innerHTML = dynamicContent_ajaxObjects[ajaxIndex].response;
        if(enableCache){
                jsCache[url] =         dynamicContent_ajaxObjects[ajaxIndex].response;
        }
        dynamicContent_ajaxObjects[ajaxIndex] = false;
        
        ajax_parseJs(targetObj)
}

function ajax_loadContent(divId,url)
{
        if(enableCache && jsCache[url]){
                document.getElementById(divId).innerHTML = jsCache[url];
                ajax_parseJs(document.getElementById(divId))
                evaluateCss(document.getElementById(divId))
                return;
        }
        
        var ajaxIndex = dynamicContent_ajaxObjects.length;
        document.getElementById(divId).innerHTML = 'Enviando dados, por favor aguarde...';
        dynamicContent_ajaxObjects[ajaxIndex] = new sack();
        
        if(url.indexOf('?')>=0){
                dynamicContent_ajaxObjects[ajaxIndex].method='GET';
                var string = url.substring(url.indexOf('?'));
                url = url.replace(string,'');
                string = string.replace('?','');
                var items = string.split(/&/g);
                for(var no=0;no<items.length;no++){
                        var tokens = items[no].split('=');
                        if(tokens.length==2){
                                dynamicContent_ajaxObjects[ajaxIndex].setVar(tokens[0],tokens[1]);
                        }        
                }        
                url = url.replace(string,'');
        }

        
        dynamicContent_ajaxObjects[ajaxIndex].requestFile = url;        // Specifying which file to get
        dynamicContent_ajaxObjects[ajaxIndex].onCompletion = function(){ ajax_showContent(divId,ajaxIndex,url); };        // Specify function that will be executed after file has been found
        dynamicContent_ajaxObjects[ajaxIndex].runAJAX();                // Execute AJAX function        
        
        
}

function ajax_parseJs(obj)
{
        var scriptTags = obj.getElementsByTagName('SCRIPT');
        var string = '';
        var jsCode = '';
        for(var no=0;no<scriptTags.length;no++){        
                if(scriptTags[no].src){
                var head = document.getElementsByTagName("head")[0];
                var scriptObj = document.createElement("script");
        
                scriptObj.setAttribute("type", "text/javascript");
                scriptObj.setAttribute("src", scriptTags[no].src);          
                }else{
                        if(navigator.userAgent.toLowerCase().indexOf('opera')>=0){
                                jsCode = jsCode + scriptTags[no].text + '\n';
                        }
                        else
                                jsCode = jsCode + scriptTags[no].innerHTML;        
                }
                
        }

        if(jsCode)ajax_installScript(jsCode);
}


function ajax_installScript(script)
{                
    if (!script)
        return;                
    if (window.execScript){                
            window.execScript(script)
    }else if(window.jQuery && jQuery.browser.safari){ // safari detection in jQuery
        window.setTimeout(script,0);
    }else{                
        window.setTimeout( script, 0 );
    } 
}        
        
        
function evaluateCss(obj)
{
        var cssTags = obj.getElementsByTagName('STYLE');
        var head = document.getElementsByTagName('HEAD')[0];
        for(var no=0;no<cssTags.length;no++){
                head.appendChild(cssTags[no]);
        }        
}