/**
 * @author INGENIERIA SCANDIMEX LTDA
 */
function switchMenu(obj){
    var el = document.getElementById(obj);
    if (el.style.display != "none") {
        el.style.display = 'none';
    }
    else {
        el.style.display = '';
    }
}

function $(){
    var elements = new Array();
    for (var i = 0; i < arguments.length; i++) {
        var element = arguments[i];
        if (typeof element == 'string') 
            element = document.getElementById(element);
        if (arguments.length == 1) 
            return element;
        elements.push(element);
    }
    return elements;
}

function addEvent(obj, type, fn){
    if (obj.addEventListener) {
        obj.addEventListener(type, fn, false);
        EventCache.add(obj, type, fn);
    }
    else 
        if (obj.attachEvent) {
            obj["e" + type + fn] = fn;
            obj[type + fn] = function(){
                obj["e" + type + fn](window.event);
            }
            obj.attachEvent("on" + type, obj[type + fn]);
            EventCache.add(obj, type, fn);
        }
        else {
            obj["on" + type] = obj["e" + type + fn];
        }
}

var EventCache = function(){
    var listEvents = [];
    return {
        listEvents: listEvents,
        add: function(node, sEventName, fHandler){
            listEvents.push(arguments);
        },
        flush: function(){
            var i, item;
            for (i = listEvents.length - 1; i >= 0; i = i - 1) {
                item = listEvents[i];
                if (item[0].removeEventListener) {
                    item[0].removeEventListener(item[1], item[2], item[3]);
                };
                if (item[1].substring(0, 2) != "on") {
                    item[1] = "on" + item[1];
                };
                if (item[0].detachEvent) {
                    item[0].detachEvent(item[1], item[2]);
                };
                item[0][item[1]] = null;
            };
                    }
    };
}();
addEvent(window, 'unload', EventCache.flush);



function collapseAll(objs){

    var i;
    
    for (i = 0; i < objs.length; i++) {
    
        objs[i].style.display = 'none';
        
    }
    
}

/*

 function pageLoad() {

 collapseAll($('myDiv1','myDiv2','myDiv3'));

 }

 addEvent(window,'load',pageLoad);

 */