Disable reload and f5 on my php page

Question

i am using a timer on my php page but when some refresh the page the timer start from begin. i want to disable f5 or reload option on my php page.

Thanks in advance

Answer 1

I test it and it works.

function disable_f5(e)
{
  if ((e.which || e.keyCode) == 116)
  {
      e.preventDefault();
  }
}

$(document).ready(function(){
    $(document).bind("keydown", disable_f5);    
});