jQuery.prototype.each = function(fn, args) {

return jQuery.each(this, fn, args);

jQuery.each = function(obj, fn, args) {

if (args) {

if (obj.length == undefined) {

for (var i in obj)

fn.apply(obj, args);

} else {

for (var i = 0, ol = obj.length; i < ol; i++) {

if (fn.apply(obj, args) === false)

break;

}

}

} else {

if (obj.length == undefined) {

for (var i in obj)

fn.call(obj, i, obj);

} else {

for (var i = 0, ol = obj.length, val = obj[0];

i < ol && fn.call(val, i, val) !== false;

val = obj[++i]) { }

}

}

return obj;

var arr = ["one", "two", "three", "four", "five"];

var obj = { one: 1, two: 2, three: 3, four: 4, five: 5 };

jQuery.each(arr, function() {

alert(this);

});

/*

one,two,three,four,five

*/

jQuery.each(obj, function(i, val) {

alert(i+":"+val);

});

/*

one:1 two:2 three:3 four:4
five:5

*/

jQuery.each(arr, function(i, val) {

alert(i);

});

/*

0,1,2,3,4

*/

jQuery.each(arr, function(i, val) {

alert(arr);

});

/*

one tow three four five