javascript - Saving button count value on jquery script -

i trying script working

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>        <input type="text" value="valueofbutton" id="number"/>    <input type="hidden" value="1" id="number1" min="0"/>    <input type="button" id="increment" value="increase"/>    <input type="button" id="decrement" value="decrease"/>  </body>  </div>    <script language='javascript' type='text/javascript'>    $(document).ready(function(){      $("#increment").click(function(){        if($('#number1').val() !="0"){          var $n = $("#number1");          $n.val(number($n.val())-1);          var value = $n.val();          $("#number").val(value +' valuedisplayed');         }      });         $("#decrement").click(function(){        if($('#number1').val() !="20"){          var $n = $("#number1");          $n.val(number($n.val())+1);          var value = $n.val();          $("#number").val(value +' valuedisplayed');        }      });    });  </script>

it's working well. want value user#1 clicks should displayed when user#2 enter page.

for example if user#1 clicked 1 time @ increase button value displayed 1 click

if user#2 enter page , when clicks on increase button value 2 , not 1 (because user#1 has clicked) or if user#2 clicks decrease value displayed 0

can save information (number of clicked increase/decrease) in txt file in server?

how can that?

how make buttons clickable once per session?

your question not clear. if save value 'number' in txt file, can make ajax call php file can save data as:

file_put_contents('sample.txt',$number);