Banner alignment [SOLVED]

Hi, i have the banner not align to the top, it has an empty space between the menu and the banner, how can i reposition this? to the top? right below the menu bar. this is the code:
/* banner */
.banner div {
display: none;
vertical-align: top;
text-align: center;
width: 100%;
}

.banner div:first-child {
display: block;

}
.banner div img {
margin-top: 0px;
vertical-align: top;
margin-bottom: 5px;
}

Its not a css issue. You set your banner size 500x500 and the extra space gets filled white. Resize you banner properly from admin.

i want to create position for banner according to my need but i don't know how to set it. like left upper or down.

solved, thanks, it was the margins set in the admin panel, it was too big. thanks florinsith!!