setInterval("refreshImagem()", 1500000);
    function refreshImagem()
    {   
        var numeroAleatorio = Math.random() * 100000;
        var dropdown = (document.getElementById("ctl00_ctl00_cplhConteudoInterno_plhMoldura_ctl00_ddlCameras") == null) ?  document.getElementById("ctl00_ctl00_cplhConteudoInterno_uscCamera_ddlCameras") : document.getElementById("ctl00_ctl00_cplhConteudoInterno_plhMoldura_ctl00_ddlCameras");
        var imagem = dropdown.value + "?" + parseInt(numeroAleatorio);
        
        document.getElementById("imgCamera").src  = imagem;
    }
    refreshImagem();

    function mostraImgGrande()
    {
        //document.getElementById("ctl00_ctl00_plhEcovia_ecoCamera_ddlCameras").style.visibility = "hidden";
        document.getElementById('imgCameraGrande').src = document.getElementById('imgCamera').src;
        document.getElementById('boxImgCameraGrande').style.display = "block";
    }

    function escondeImgGrande()
    {
        //document.getElementById("ctl00_ctl00_plhEcovia_ecoCamera_ddlCameras").style.visibility = "visible";
        document.getElementById('boxImgCameraGrande').style.display = "none";
    }