php - Javascript scope and sequentiality issue -

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i want id query , display in html.

i want keep things in separate javascript files, because in future, retrieve json php , filter based on checkboxes, radio buttons, etc. , display result.

in moment, blank page, , id value not shown, i'm doing wrong. 

http://localhost:10600/js1/index.php?id=5

index.php

<html> <head> <script type='text/javascript' src='https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js'></script> </head>     <body>         <div class="results"></div>     </body> </html>  <script type="text/javascript" src="config.js"></script> <script type="text/javascript" src="display.js"></script> <script type="text/javascript" src="sequence.js"></script>

config.js

function getid() {     id = "<?php echo $_get['id']; ?>"; }

display.js 

function updatehtml() { window.onload = function() {     document.queryselector('.results').innerhtml = id; } }

sequence.js

function seq() {     getid();     updatehtml();    } seq();

please try following: index.php

<html> <head> <script type='text/javascript' src='https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js'></script> </head>     <body>         <div class="results"></div>     </body> </html>  <script type="text/javascript"> var id; function getid() {     id = "<?php echo $_get['id']; ?>"; }  </script> <script type="text/javascript" src="display.js"></script> <script type="text/javascript" src="sequence.js"></script>

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