source: trunk/www.guidonia.net/wp/wp-content/plugins/minimax/scripts/minimax.js@ 44

//Trobler class
function Trobbler(div, active, inactive) {
        var me = this;
        
        me.activate = function() {
                var aux = document.getElementById(div);
                aux.setAttribute("class", active);
                aux.setAttribute("className", active); //IE sucks
        }
        
        me.close = function() {
                var aux = document.getElementById(div);
                aux.setAttribute("class", inactive);
                aux.setAttribute("className", inactive); //IE sucks
        }
        
}

// Read the answer of an URL and write the contents into a 'div'

function minimax(url, div) {    
        var me = this;

        var semaphore = false;
        var haveSemaphore = false;
        
        var trobbler=false;
        var haveTrobbler=false;
        
        me.xhr = false;
        
        if (window.XMLHttpRequest) { // Si es Mozilla, Safari etc
                me.xhr = new XMLHttpRequest()
        } else { 
                if (window.ActiveXObject) { // pero si es IE
                        try {
                                me.xhr = new ActiveXObject('Microsoft.XMLHTTP')
                        } catch (e) { // en caso que sea una versión antigua
                                try {
                                        me.xhr = new ActiveXObject('Msxml2.XMLHTTP')
                                } catch (e){}
                        }
                } else {
                        return false
                }
        }
        
        me.setDiv = function(div_x) {
                div=div_x;
        }
        
        me.setSemaphore = function(sname) {
                semaphore=document.getElementById(sname);
                haveSemaphore = true;
                if(semaphore.value=='') {
                        semaphore.value='1';
                }
        }
                
        me.setTrobbler = function(tdiv,on,off) {
                trobbler=new Trobbler(tdiv,on,off);
                haveTrobbler = true;
        }
        
        me.closeTrobbler = function() {
                if(haveTrobbler) trobbler.close();
        }
        
        me.activateTrobbler = function() {
          if(haveTrobbler) trobbler.activate();
        }
        
        me.xhr.onreadystatechange = function() {
                if (me.xhr.readyState == 4 && me.xhr.status==200 ) {
//              var doc=me.xhr.responseXML;
//              var body = doc.getElementsByTagName('html')[0];
//              alert(body.childNodes[3].textContent);
//              document.getElementById(div).innerHTML=body.childNodes[3].textContent;
                        var text=me.xhr.responseText;
                        if(haveSemaphore) semaphore.value='1';
                        if(haveTrobbler) trobbler.close();
                        if(div) document.getElementById(div).innerHTML=text;
                }
        }
        
        me.get = function () {
                if(haveTrobbler) trobbler.activate();
                //If the semaphore is in 0, request another get in 1 second,
                //for we are doing something and the result from the other
                //process would be older than ours
                if(!haveSemaphore || semaphore.value=='1') {
                        /* Esto es insultante, pero Explorer solo funciona en POST */
                        if(haveSemaphore) semaphore.value='0';
                        me.xhr.open('POST', url, true);
                        //me.xhr.overrideMimeType('text/xml');
                        me.xhr.send(null);
                } else { 
                        setTimeout(function (){ me.get(); }, 300);
                }
        }
        
        me.post = function (post_x) {
                if(haveTrobbler) trobbler.activate();           
                //If the semaphore is in 0, request another post in 1 second,
                //for we are sending something and the result from the other
                //process would be older than ours
                post_x=post_x.replace(/\&/g, '&');
                if(!haveSemaphore || semaphore.value=='1') {
                        if(haveSemaphore) semaphore.value='0';
                        me.xhr.open('POST', url);
                        //me.xhr.overrideMimeType('text/xml');
                        me.xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                        me.xhr.send(post_x);
                } else { 
                                setTimeout(function (){ me.post(post_x); }, 300);
                }
        }
        
        //return me.xhr;
        
}