var want_price=new Array();
want_price['phys_2007']=500;
want_price['phys_2006']=500;
+want_price[ 'cd_2006']=480;
want_price['phys_2005']=480;
-want_price['phys_2004']=480;
+want_price[ 'cd_2005']=480;
want_price[ 'cd_2004']=480;
want_price[ 'cd_2003']=480;
want_price[ 'cd_2002']=280;