function readURL(website)
%read website's data,if no input,read default homepage.
if nargin==0
    website='http://www.sina.com.cn';
end
%create URL object
url=java.net.URL(website);
%create input stream
is=openStream(url);
isr=java.io.InputStreamReader(is);
br=java.io.BufferedReader(isr);
%read network page's data
for i=0:44
    s=readLine(br);
end
readLine(br)
readLine(br)
readLine(br)