JavaScript programming language

JavaScript is especially useful for making your web pages interactive.

Button rollovers: when you move your mouse over a button, it highlights.
Menus: when you clicks on menu work, you get a drop down list of menu choices.
Calculator: you type numbers into a web form, then JavaScript calculates results.
Autocomplete: you start typing a search word, then JavaScript suggests possible matches.
Maps: Google maps uses lots of JavaScript for scrolling, highlighting, and pinpointing.
AJAX: advanced ways to do smarter, faster web pages by using dynamic data transfer.

  // Make the web browser show a pop up
  // that says Hello World to the user

  function hi(){
   alert("Hello World");
  }