.z-45 {
    position: fixed; 
    z-index: 45; 
    left: 0;
    top:0;
}
.z-60 {
    position: fixed; 
    z-index: 60; 
    left: 0;
    top:0;
}
.z-70 {
    position: fixed; 
    z-index: 70; 
    left: 0;
    top:0;
}
.z-80 {
    position: fixed; 
    z-index: 80; 
    left: 0;
    top:0;
}
.z-90 {
    position: fixed; 
    z-index: 90; 
    left: 0;
    top:0;
}
.z-100 {
    position: fixed; 
    z-index: 100; 
    left: 0;
    top:0;
}
.z-110 {
    position: fixed; 
    z-index: 110; 
    left: 0;
    top:0;
}
.z-all {
    position: fixed; 
    z-index: 99999; 
    left: 0;
    top:0;
}