1. הגדרה וקריאה לפונקציה

2. פונקציות כנתונים

3. טווח הכרה- אובייקט ה-Call

4. ארגומנטים של פונקציה

5. תכונות של פונקציות ומתודות

<SCRIPT LANGAUGE = "JS">

<!-- JS יש להחביא מדפדפנים שאינם מבינים  

function dateinbar()
{
   var d = new Date();
   var y = d.getFullYear();
   var m = d.getMonth() + 1;
   var d = d.getDate();
   var t = d + "/" + m + "/" + y ;
   alert("You arrived at the page on " + t + ".");
}

-->

</SCRIPT>

<input type="button" value="get date" onclick="dateinbar()">

function Add(x,y)
{
 x+=y;
 document.write("Now x=x+y");
}

function raiseP(x,y)
{
 total = 1;
 for(j=0;j<y;j++)
 { total*=x; }

 return total;
}
total=raiseP(4,3);
document.write("4 raised to the 3rd power is "+total);

var f = new Function("x", "y", "return x*y;");

function f(x,y){ return x*y; }

var f = function(x){ x*x; };

a[0] = function(x){ return x*x; }; 

a.sort(function(a,b){ return a-b; }); 

var tensquared =(function(x){ return x*x; }) (10); 

Function square(x){ return x*x; } 

a = square(4); 
b = square; 
c = b(5); 

o = new object; 
o.square = new Function(x,return x*x) 

a = new array(10); 
a[0] = function(x){ return x*x; } 
a[1] = 20; 
a[2] = a[0](a[1]);

function add(x,y){ return x + y; }
function subtract(x,y){ return x - y; }
function multiply(x,y){ return x * y; }
function divide(x,y){ return x / y; }

function operate(operator,operand1,operand2)
{
  return operator(operand1,operand2);
}

var i = operate(add, operate(add,2,3), operate(multiply, 4,5));

var operators = new Object();
operators["add"] = function(x,y){ return x + y; }
operators["subtract"] = function(x,y){ return x - y; }
operators["multiply"] = function(x,y){ return x * y; }
operators["divide"] = function(x,y){ return x / y; }
operators["pow"] = Math.pow;

function operate2(op_name, operand1, operand2)
{
 if(operators[op_name] == null)
    return "unknown operator";
 else
    return operators[op_name](operand1,operand2);
}

var j = operate2("add", "hello", operate2("add"," ", "world"))

var k = operate2("pow",10,2)

function(x) 
{ 
 if(x>1) return x* arguments.callee(x-1); 
 return x; 
} 

function funcname(f)
{
  var s = f.toString().match(/function (\w*)/)[1];
  if ((s == null) || (s.length == 0)) 
         return anonymous;
  return s;
}

function stacktrace()
{
  var s = "";
  for(var a = arguments.caller; a != null; a = a.caller)
  {
    s += funcname(a.callee) + "\n";
    if(a.caller == a) break;
  }
  return s;
}

f.apply(0,[1,2]);

o.m = f;
o.m(1,2);
delete o.m;