DIV.container
{
position:absolute;
left: 50%;
margin-left: -390; /*set to a negative number 1/2 of your width*/
width:780px; 
}

BODY
{ 
margin: 0px 0px 0px 0px;
}

FORM
{ 
margin : 0px 0px 0px 0px;
padding: 0px 0px 0px 0px;
}

IMG
{
border-width: 0px 0px 0px 0px;
}