.contact_main{
	margin:0px auto;
	text-align:left;
	width:905px;
	height:auto;
	overflow:hidden;
	zoom:1;
}
.contact_main_box{
	width:620px;
}
.conten_box1{
	position:relative;width:905px;clear:both;
}
.conten_box1_left{
	float:left;display:inline;width:420px;
}