//Menu Desdobravel em div com ul e li
//Linkway Internet Provider
		function display(id, on_off) { 
                var el = document.all ? document.all[id]:document.getElementById(id); 
                if(el) el.style.display = on_off ? '':'none';
        }
		function open_close_menu(id, classname) {
                close_outros_menus(classname);
                if(id.length>0){
                        var el = document.all ? document.all[id]:document.getElementById(id);
                        if (el.style.display == 'none') {
                                display(id, 1);
                        }
                        else {
                                display(id, 0);
                        }
                }
        }            
		function close_outros_menus(classname) {
                var allElems = document.getElementsByTagName('*');
                for(var i=0; i<allElems.length; i++){
                        var thisElem = allElems[i];
                        if (thisElem.className && thisElem.className == classname) {
                                thisElem.style.display='none';
                        }
                        if(classname == 'mnunivel2' && (thisElem.className == 'mnunivel3' || thisElem.className == 'mnunivel4') ){
                                thisElem.style.display='none';
                        }
                        
                        if(classname == 'mnunivel3' && thisElem.className == 'mnunivel4'){
                                thisElem.style.display='none';
                        }
                }
        } 
		function trocaConteudo(url){
        document.getElementById('conteudo').src = url;
		}