The difference magin and padding: https: //www.cnblogs.com/zxnn/p/8186225.html
Between brothers: magin
padding: parent-child relationship
and left and right body frame web distance magin 8 (fixed)
The following is the basic code for experiments :()
Experiment with style:
script：
This amplification effect provided there is a big picture and a small picture, not our operations to make it larger, it is already a big blanket!
Also note that we use onmouseover and onmouseout time will trigger bubble, the operation will be executed at this time that the picture is displayed several times, then we can use onmouseenter and onmouseleave instead, these two methods will not trigger this bubble reaction
Analog scroll bar:
Red is we write, gray is that we use overflow: auto with their own system of
Animation encapsulated into a function which can later use
If you click on a button multiple times will speed up the moving speed (per point once they create a timer), in order to avoid
In this case you can create animated user to multiple boxes
If time animation in a box you want to know his place, then you have to set a timer from time to time to see
Callback function to use, so that the two boxes were arriving in the destination, from one to another began to go
10 two output
Function is only called back
10 undefine
Pre-analytical variables: first declaration in advance, but the assignment the same position, then the order to execute code
The method of this, is to call the object object
If the method to a function, use the "function name ()" at this time, this represents the window
But the constructor constructor of this attribute is not an object
But if sayHi this function to write out that their address is the same, until then compare their values is true
Advantages: save memory
Disadvantages: possible naming conflicts
prototype: prototype object constructor
By using prototype to add something to the constructor, then this thing in memory address only one, although you create multiple objects
When members find someone to access an object's member objects, if not then look for an object prototype member
Between them by _proto _----> prototype connected
Examples of members: can be accessed through the object, as defined in the above sayHi constructor is an instance member
Relationship included solid lines represent
Prototype chain:
Prototype object ----> prototype object ----> prototype object: the prototype chain
When a property call the object, we find that order, find a stop, followed by the chain looking for can not be found
Prototype chain from bottom to top:
But like this, then there will be bug, this time 
attributes construct and not the same as before, pointing to the error occurred, and you write the original function inside will not, he had the equivalent of you reset
Resolve the error; the value of this set point to construct constructor
The constructor provided by the system:
Some functions are defined in an object provided inside the prototype object, which can be shared
Can not write, so the system he had a limit, you write is useless, because the system for many functions provided by him, if you re-assignment to clear things inside certainly not
