Felayman -- ecmascript-function _ object_simple understanding

/* Core Content 1. syntax 2. type 3. statement 4. keyword 5. reserved Words 6. object 7. function 1. Keywords of ecmascript5 break do instanceof typeof case else new var catch finally return void continue for switch while debugger function this with default if throw delete in try 2. Reserved Words of ecmascript5 abstract enum int short boolean export interface static char extends long super char final native synchronized class float package throws const goto private transie Nt debugger implements protected volatile double import public 3. Variable-loose variable (which can store any type of data) -global variable-local variable-variable scope * // global variable function print (str) {document. writeln (str + '