Can HTML5 directly talk to a web service?

I need to talk to a server via web services (i think it's soap) using HTML 5 alone. For instance, I need to login a user into a site by using HTML5 to directly talk to the web service. Is that possible?
melwongAsked:
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melwongAuthor Commented:
even if i can call, how do i login the user with HTML5. i can't, can i?
Gurvinder Pal SinghCommented:
why can't you? what is the ajax response that you get? are you not able to parse that response?
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melwongAuthor Commented:
the web service handles the logins. I'm not using php in my site to do login processing. But how do i handle the session in html5?

Meaning in my html5 login page, user enters username/password
Then the username/pass is send to the web service and it will response positively if the username/pass exists
Then what do my HTML5 do?
Gurvinder Pal SinghCommented:
<<Then what do my HTML5 do?>>
Implement the callbackhandler to catch the response of that ajax call.

There is nothing that seems to be specific to html5 to me in your requirement.

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melwongAuthor Commented:
thx
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