link javascript to html

<script src="PathToYourFile.js"> </script><script src="index.js"> </script>  
    <script src="myscripts.js"></script>
  
 <script src="index.js"></script><script type="text/javascript" src="monscript.js"></script><script src="Your-JavaScript-File.js"></script> <!--If JS file is in same folder with HTML file-->