Macromedia dreamweaver 8-extending dreamweaver User Manual

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Server behavior techniques
377
If a JavaScript file has the 
SHARE-IN-MEMORY
 directive and an HTML file references it (by 
using the 
SCRIPT
 tag with the 
SRC
 attribute), Dreamweaver loads the JavaScript into a 
memory location where the code is implicitly included in all HTML files thereafter.
NO
TE
Because JavaScript files that are loaded into this central location share memory, the 
files cannot duplicate any declarations. If a share-in-memory file defines a variable or 
function and any other JavaScript file defines the same variable or function, a name 
conflict occurs. When writing new JavaScript files, be aware of these files and their 
naming conventions.