We would like to know if it is possible to modify our website which has been developed in ASP so that it becomes responsive, but especially by keeping the headers and footers in a fixed position.
Here is the original version of our website (not responsive) : http://www.ex0-sys.ch/
We have a test version of our site that is responsive, but we do not master the technique to maintain our original design.
Here the test version being modified (responsive) : http://22.214.171.124/Ex0.Web.Staging/
What technologies should we use because it seems to be a major problem for everyone?
Thank you in advance for your answers.