三列布局如何设置与左右之间的距离
.left{ width:200px; height:600px; background:#ccc; position:absolte; left:0; top:0}
.main{ height:600px; margin:0px 310px 0px 210px; background:#9CF}
.right{ height:600px; width:300px; position:absolute; top:0; right:0; background:#FCC;}
如何从这里看出是与左右有10px的距离的??