In the IDL: Item=HSOS_search(T0=,T1=T1,levevl=level,AR=AR,type=type,download=download,path_curl=path_curl)
T0: start time,ex. CCDS TIME format: 2017-07-12T00:00:00
T1: end time, ex. CCDS TIME format: 2017-07-12T23:00:00
AR; Active Region's data (ex AR='AR12665')
level: String format: 'C2', 'C3', default='C3'
download: wheather to download default=0, no download
path_curl: path to the curl.