How could I auto populate values on a website and execute without any help from the owner of said website

I have this time clock that I have to punch in and out of at work. I would like to write a simple application to populate the loggin, select the appropriate in/out radio button and submit.

I would like to begin this project but I'm unsure about where to start. Could someone point me in the right direction?

The specific site that I need to program against is the following (not sure if this helps) https://www.payrollservers.us/sc/clock/webclock.asp

To clarify: I want to make an application to sign in and out without actually ever going to the website. Basically, I want to automate the entire process with 开发者_JAVA百科a button or two.

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Use HtmlUnit. It's a programmatic web browser: with Java code, you tell it to go to the URL, find the form with a given ID or name (for example), fill in the text input field "A" with "foo", submit the form by clicking the "Log in" button, etc. Its Get Started page has useful examples.

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Assuming you just want to autofill some values on a specific form, you can write a userscript for the browser of your preference. I can't say much more without you clarifying your question.

Without going to the site, you can write a simple script that does an HTTP POST to the form.
Such script or program can be written in variety of languages, including but not limited to Python, Ruby, C#, etc.