#div1 {
	width: 33.33%;
	float: left;
}
#div2 {
	width: 33.33%;
	margin: 0 auto;
	float: left;
}
#div3 {
	width: 33.33%;
	float: right;
}
#div4 {
	width: 50%;
	float: left;
}
#div5 {
	width: 50%;
	float: right;
}