Do you "double click this file" anywhere or on the specified place/control/label?

>I have a html file which we recieve from a customer. When we double click this file it exports data and creates an excel file to the root of the hard drive. When you view the source of the information contained within the HTML file there is some javascript which does the extraction.
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>There are several of these files and everyday we have to open each one up and then save it. It takes 20 mins to do this. I would like to create a little program to open each of these files and then save them automatically.
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>How can I open HTML files easily?
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>Many Thanks