*{
 margin: 0;
 padding: 0;
}
#conteiner{
    margin: 0 auto;
    width: 1000px;
    background-color: #ccccff;
}
#header{
    height: 100px;
}
#content{
    height: 500px;
}
#form-select{
    border: 1px solid #fff;
}
#footer{
    height: 50px;
}
#loader{
    position: absolute;
    text-align: center;
    width: 100px;
    height: 100px;
    top: 50%;
    left: 50%;
    margin-left: -50px;
    margin-top: -50px;
}