var ROTATECZ = '';
var PAUSECZ = false;
var INDEXCZ = 0;
var LISTACZ = listaCZ;
var LENCZ = LISTACZ.length;

function AlternaDivCZ(antDivId, divId){
    // oculta div anterior e mostra div atual
    var antDiv = document.getElementById(antDivId);
    var div = document.getElementById(divId);
    antDiv.style.display = "none";
    div.style.display = "block";
}
 
function rotacionaDivsCZ(i,tipo){
    // rotaciona os divs
    INDEXCZ = i;
    if (tipo == 'prev'){
        if(INDEXCZ < LENCZ-1){antIndice = INDEXCZ+1;}
        else{antIndice = 0;}
    }
    else{
        if (INDEXCZ == 0){antIndice = LENCZ-1;}
        else{antIndice = INDEXCZ-1;}
    }
    AlternaDivCZ(LISTACZ[antIndice], LISTACZ[INDEXCZ])
    if (INDEXCZ < LENCZ-1){proxIndice = INDEXCZ+1;}
    else{proxIndice = 0;}
    ROTATECZ = window.setTimeout('rotacionaDivsCZ('+proxIndice+')',5000);
}

function PAUSECZDivsCZ(){
    if (PAUSECZ){
        PAUSECZ = false;
        if (INDEXCZ < LENCZ-1){i = INDEXCZ+1;}
        else{i = 0;}
        rotacionaDivsCZ(i,'');
    }
    else{
        PAUSECZ = true;
        clearInterval(ROTATECZ);
    }
}
function previousDivCZ(){
    if (PAUSECZ){
        if (INDEXCZ == 0){antIndice = LENCZ-1;}
        else{antIndice = INDEXCZ-1;}
        AlternaDivCZ(LISTACZ[INDEXCZ], LISTACZ[antIndice])
        INDEXCZ = antIndice;
    }
    else{
        clearInterval(ROTATECZ);
        if (INDEXCZ == 0){i = LENCZ-1;}
        else{i = INDEXCZ-1;}
        rotacionaDivsCZ(i,'prev');
    }
}
function nextDivCZ(){
    if (PAUSECZ){
        if (INDEXCZ < LENCZ-1){proxIndice = INDEXCZ+1;}
        else{proxIndice = 0;}
        AlternaDivCZ(LISTACZ[INDEXCZ], LISTACZ[proxIndice])
        INDEXCZ = proxIndice;
        
    }
    else{
        clearInterval(ROTATECZ);
        if (INDEXCZ < LENCZ-1){i = INDEXCZ+1;}
        else{i = 0;}
        rotacionaDivsCZ(i,'');
    }
}