command web works but webread does not work

following codes works: url = 'https://mitem.jd.hk/ware/view.action?wareId=2273486'; [f,h] = web(url,'-new'); pause(2); str = get(h,'HtmlText'); the str has all info I need; But the codes following does not work: url = 'https://mitem.jd.hk/ware/view.action?wareId=2273486'; str = webread(url); the str has same return url, which is 'returnUrl=http://mitem.jd.hk/ware/view.action?wareId=2273486'

How can I use websave or webread to solve this problem? thx a lot.