.alignleft {
        float: left;
    }
.alignright {
        float: right;
    }
.alignclear {
        clear: both;
    }
.px300 {
	width: 300px;
}
.px600 {
        width: 600px;
}
.px450 {
        width: 450px;
	max-width:44%;
}