Hi @iamfph,
Coming at this question so late I didn't adequately read your request. Looks like you're wanting to build a custom web interface and you're using the FlexSim webserver?
The FlexSim webserver allows your model to serve up a custom web interface, but you'll need to be pretty familiar with both FlexSim and web programming.
To start, check out the webserver documentation. It's all good background information, but the parts that most pertain to your question are under the heading Developing Custom Web Interfaces, and in particular the sub headings Instance Queries and Default Page.
The Default Page section shows where in your model tree to look at the code that your model is serving to the web browser. Here is where you can edit FlexSim's default code until you transform FlexSim's default page into what you want.
Look that over, then if you have any specific questions, please ask a brand new question, rather than adding to this old one.
Thanks!