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**Category:** Builder\
**Created:** [September 21, 2017, 11:23pm UTC](https://discourse.psychopy.org/t/running-html-experiment-quick-question/3106 "2017-09-21T23:23:39Z")\
**Posts on this page:** 3\
**Page:** 1
**Author:**  [@DavyS](https://discourse.psychopy.org/u/DavyS)\
**Post date:** [September 21, 2017, 11:23pm UTC](https://discourse.psychopy.org/t/running-html-experiment-quick-question/3106/1 "2017-09-21T23:23:39Z")
Hey everyone,
Doing a dissertation in my final year of psychology undergra, and I’m trying to get a trial version of my experiment to load up in my browser, so I can put it on a webserver and eventually online for the world to use!
**OS** (e.g. Win10): WIN10
**PsychoPy version** (e.g. 1.84.x): 185.2
**Standard Standalone? (y/n)** y
**What are you trying to achieve?:**
Trying to test my experiment online by running the index.html
**What specifically went wrong when you tried that?:**
When I load up my experiment in the browser, it seems to load fine except the first window where you can select/input “participant number” and “session number” at the top says "fields with an asterisk (\*) are required. In this window, the “ok” button stays greyed out, regardless of what I put into both fields, causing me/anyone to be unable to actually start the experiment.
What am I doing wrong? How can I fix this?
Apologies for the probable silly question!
Kind regards,
Davy
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**Author:**  [@DavyS](https://discourse.psychopy.org/u/DavyS)\
**Post date:** [September 27, 2017, 12:47pm UTC](https://discourse.psychopy.org/t/running-html-experiment-quick-question/3106/2 "2017-09-27T12:47:42Z")
Hi guys,
Any help on this? It’s such a silly issue. I’ve tried opening the index.html in multiple browsers but just cannot press the “ok” button to actually start the experiment. This even happens with the pre-made demos when exported to HTML.
Any help would be greatly appreciated…
Thank you so much,
Davy
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**Author:**  [@fionakirton](https://discourse.psychopy.org/u/fionakirton)\
**Post date:** [September 27, 2017, 2:03pm UTC](https://discourse.psychopy.org/t/running-html-experiment-quick-question/3106/3 "2017-09-27T14:03:32Z")
Hi Davy,
The problem is likely to be that you’re trying to open your web page directly in the browser. You need to access your site through a web server. A local server is fine if you’re still at the stage of testing your code. I use MAMP ([https://www.mamp.info](https://www.mamp.info)), which is free and available for both Mac and Windows.
Fiona.