Javascript with statement usage _ javascript skills

Js with statement usage method 1) Brief Description
The with statement can be easily used to reference the existing attributes of a specific object, but cannot be used to add attributes to the object. To create a new property for an object, you must explicitly reference the object.

2) syntax format
With (object instance)
{
// Code block
}
Sometimes, in a program code, I need to use the attributes or methods of an object multiple times. According to the previous method, all objects are written through: object. attribute or object. using this method to obtain the attributes and methods of the object is a bit difficult. after learning the with statement, you can implement it in a similar way as follows:
With (objInstance)
{
Var str = attribute 1;
.....
} It is difficult to write object names multiple times.

3) Example