html {
  overflow: hidden;
}


body {
    background-image: url(jpegs/background.png);
    background-repeat: repeat-x;
}


#main_block, #bg_block, #bg_block_2 {
	width: 889px;
	height: 580px;
	position: absolute;
    left: 50%;
    margin-left: -450px;
    border: 0px solid red;
}

#main_block {
    margin-top: 178px;
}

#weisse_block {
    height: 552px;
	position: absolute;
    width: 20px;
    background-color: #FFFFFF;
    display: none;
    right: 0px;
    border: 0px solid blue;
    z-index: 2;
}


#bg_block {
	background-image: url('jpegs/logo2.png');
	background-color: transparent;
    border: 0px solid orange;
    z-index: 1;
}

#bg_block_2 {
	background-image: url('jpegs/logo1.png');
	background-color: transparent;
    border: 0px solid orange;
    display: none;
    z-index: 1;
}

#bogen_block {
	border: 0px solid pink;
	width: 889px;
	height: 580px;
	background-image: url('jpegs/bogen_halb.png');
	background-color: transparent;
	position: absolute;
    margin-left: 787px;
    z-index: 3;
}