重点：http://www.javascriptkit.com/
create an object:
var car = new Object();
car.colour = ‘red‘;
car.wheels = 4;
car.hubcaps = ‘spinning‘;
car.age = 4;
The same can be acchieved with:
var car = {
colour : ‘red‘,
wheels: 4,
hubcaps:‘spinning‘ ,
age: 4
}
注意：But what happens when you use invalidUserInSession? The main gotcha in this notation is IE. Never ever leave a trailing comma before the closing curly brace or you’ll be in trouble.
var moviesThatNeedBetterWriters = new Array(
‘Transformers‘, ‘Transformers2‘ , ‘Avatar‘ , ‘Indiana Jones 4‘
);
var moviesThatNeedBetterWriters = [
‘Transformers‘, ‘Transformers2‘ , ‘Avatar‘ , ‘Indiana Jones 4‘
];
对数组中的数据进行排序，可以直接使用sort()，参考文章：http://www.javascriptkit.com/javatutors/arraysort.shtml
Notice that you can not use sort() on a number array because it sorts lexically（词汇方面）.
var numbers = [23 , 342 , 87 , 145];
numbers.sort(function(a , b){ return a - b;}); //ascending,升序
numbers.sort(function(a , b){return b - a;});//descending,降序
Math.max(12 , 123 , 3 , 2 , 433 , 4);//Math.max() return the largest number form a list of parameters
Because this tests for numbers and returns the largest one , you can use it to test for browser support of cetain properties.
var scrollTop = Math.max(
doc.documentElment.scrollTop,
doc.body.scrollTop
);