CSS 2 col

col.css

/* css two col function */

.col2(@sider: 200px, @space: 20px) {

	.sider {
		background-color: #ddd; /* just for demo */
		width: @sider;
		float: left;
	}
	.content {
		width: 100%;
		float: left;
		margin-left: 0 - @sider;
	}
	.inner {
		margin-left: @sider + @space;
		background-color: #f00; /* just for demo */
	}
}

/* usage demo */

.col2_demo {
	width: 700px;
	.col2(400px, 20px);      
}