"Scripts can be in the <head> section, the <body>
section, or an external file"
"three choices"
"Scripts in the <head> section are loaded first"
"Not all scripts are executed automatically"
"a script can be called when it is triggered by an event"
"the filename with javaScript scripts ends with .js"
- Learn Java Script: Where use JavaScript
http://r2.sharedcopy.com/406v4