function newImage(strSrc){
    
    var oImg = new Image();
    oImg.src = strSrc;
    return oImg;
    
}

function home(nm, status){
    
    if(document.images[nm]){
        document.images[nm].src = eval(nm + '_' + status + '.src');
    }
    
}

function faixa(nm, cor){
    
    if(document.images[nm]){
        document.images[nm].src = eval(cor + '.src');
    }
    
}

function mapa(num){
    
    if(document.images['regiao'])
        document.images['regiao'].src = eval('regiao_' + num + '.src');
}

var i_on  = newImage('images/menu/i_on.gif');
var i_off = newImage('images/menu/i.gif');
var n_on  = newImage('images/menu/n_on.gif');
var n_off = newImage('images/menu/n.gif');
var p_on  = newImage('images/menu/p_on.gif');
var p_off = newImage('images/menu/p.gif');
var r_on  = newImage('images/menu/r_on.gif');
var r_off = newImage('images/menu/r.gif');
var c_on  = newImage('images/menu/c_on.gif');
var c_off = newImage('images/menu/c.gif');


var verm   = newImage('images/tc_verm.gif');
var cinza  = newImage('images/tc_cinza.gif');

var regiao_1 = newImage('images/mapa_1.gif');
var regiao_2 = newImage('images/mapa_2.gif');
var regiao_3 = newImage('images/mapa_3.gif');
var regiao_4 = newImage('images/mapa_4.gif');
var regiao_5 = newImage('images/mapa_5.gif');
var regiao_  = newImage('images/mapa_.gif');