how can i use a variable of one <script> in another <script> in javascript?

Question

how can i use a variable of one in another in javascript?

Answer 1

If the two script tags are on the same page, any variable declared outside of the scope of a function is global to the page.

Answer 2

Make it global;

script1.js

 var foobar = "O HAI";

script2.js

  alert(foobar);