Topic: Referencing a JavaScript or JScript File
Referencing JavaScript or JScript File in ASP.Net
1. Go to the ASP.Net page you want to add the Script File reference and open the markup
2. Inside the <Header> tags, add the following line:
3. <scripttype="text/javascript" src="Folder/File"><script>
Where "Folder/File" is the location of the file
E.g. <script type="text/javascript" src="subs/myJavaScriptFile.js"><script>
Inside the .js file you would put JavaScript functions.