var divaberto="home";
var subdivaberto="";

function showdiv(div_id){
   document.getElementById(div_id).style.display="block";
}

function hidediv(div_id){
   document.getElementById(div_id).style.display="none";
}

function sMyDiv(div_id){
    if (divaberto==''){
        divaberto='empresa' ;
    }
    hidediv(divaberto);
    if(subdivaberto != "")
    {
        hidediv(subdivaberto);
    }
    showdiv(div_id);
    divaberto=div_id;
    subdivaberto=divaberto+"_1";
    sMySubDiv(subdivaberto);
}

function sMySubDiv(div_id){
    if (subdivaberto==''){
        subdivaberto='empresa_1';
        sMyDiv('empresa');
    }
    hidediv(subdivaberto);
    showdiv(div_id);
    subdivaberto=div_id;
}

function preloader(){
heavyImage = new Image();
heavyImage.src = "images/menu2.jpg";
}