javascript - Change active function from on click to on load -

i have function check mobile internet.

this function work of click(onclick function) work automatically when app launch!

how do?

the function this:

<script> function checkjsnetconnection(){  var xhr = new xmlhttprequest();  var file = "dot.png";  var r = math.round(math.random() * 10000);   xhr.open('head', file + "?subins=" + r, false);   try {   xhr.send();    if (xhr.status >= 200 && xhr.status < 304) {    return true;   } else {    return false;   }  } catch (e) {   return false;  } }      function onjsbuttonclick(){      if(checkjsnetconnection()==true){       alert("internet connection exists");      }else{       alert("internet connection doesn't exist");      }     }     </script> 

try :

$(document).ready(function(){    onjsbuttonclick(); }); 

add before closing </script> tag.