#content{ position:relative;/*相对定位*/width:830px;height:900px;top:0px;overflow-y : visible ;} 

#content1{ position:relative;/*相对定位*/width:230px;height:800px;top:0px;left:0px;float:left;text-align:left;padding-left:0px;padding-top:5px;float:left;overflow-y : visible ;} 
#content11{ position:relative;/*相对定位*/width:230px;height:95px;top:0px;left:0px;float:left;text-align:left;padding-left:0px;padding-top:5px;float:left;padding-left:15px;line-height:25px;background:url(../menuimg/IS_07.jpg)} 
#content12{ position:relative;/*相对定位*/width:226px;height:750px;top:10px;left:2px;float:left;text-align:left;padding-left:0px;padding-top:5px;float:left;padding-left:5px;line-height:25px;background-color:#EAEAEA;overflow-y : visible ;} 

#content2{ position:relative;/*相对定位*/width:600px;height:900px;top:0px;left:0px;float:left;text-align:left;padding-left:2px;padding-top:0px;float:left;}
#content21{ position:relative;/*相对定位*/width:598px;height:21px;top:0px;left:0px;float:left;text-align:left;padding-left:0px;padding-top:0px;float:left;background:url(../menuimg/IS_01.jpg);} 
#content22{ position:relative;/*相对定位*/width:598px;height:35px;top:0px;left:0px;float:left;text-align:left;padding-left:15px;padding-right:15px;padding-top:0px;float:left;background:url(../menuimg/IS_03.jpg) repeat-y;text-align:center;} 
#content23{ position:relative;/*相对定位*/width:598px;height:20px;top:0px;left:0px;float:left;text-align:left;padding-left:0px;padding-top:0px;float:left;background:url(../menuimg/IS_02.jpg) no-repeat;} 
#content24{ position:relative;/*相对定位*/width:598px;height:770px;top:0px;left:0px;float:left;text-align:left;padding-left:15px;padding-top:0px;padding-right:15px;float:left;background:url(../menuimg/IS_03.jpg) repeat-y;} 
#content25{ position:relative;/*相对定位*/width:598px;height:20px;top:0px;left:0px;float:left;text-align:left;padding-left:0px;padding-top:0px;float:left;background:url(../menuimg/IS_04.jpg) repeat-y;}