.index_left { width:330px; overflow:hidden; float:left;}
.index_right { width:660px; overflow:hidden; float:right; text-align:left;}

#Index{width:330px; height:210px;margin:0;}
#Index img {width:330px; height:210px;}

.index_right_left .b1 {width:350px; height:210px; overflow:hidden; float:left;}
.index_right_right .b1 {width:300px; height:210px; overflow:hidden; float:right;}