Applying object in JavaScript (2)

Five. Object Application Routines
Another example of a thermometer (thermometer) object, which is responsible for converting different temperature scales:
<script language= "JavaScript" >
Constructor
function thermometer (degrees, scale)
{
Methods
This.converttocelsius = Converttocelsius;
This.converttofahrenheit = Converttofahrenheit;
This.raisetemp = raisetemp;
Action to take
if (scale = = "F" | | scale = = "F")
{
This.scale = scale;
THIS.DEGREESF = degrees;
This.degreesc = 0;
This.converttocelsius ();
}
Else
{
This.scale = scale;
THIS.DEGREESF = 0;
This.degreesc = degrees;
This.converttofahrenheit ();
}
}
Conversion functions
function Converttocelsius ()
{
This.degreesc = (5.0/9.0) * (this.degreesf-32.0);
}
function Converttofahrenheit ()
{
THIS.DEGREESF = ((9.0/5.0) * this.degreesc) + 32.0;
}
method to raise temperature
function raisetemp (num)
{
THIS.DEGREESF + = num;
This.degreesc + = num;
}
</script>
The meaning of the above code is that the constructor creates an object, initializes it with a temperature and temperature scale, and then runs the transformation function to obtain the equivalent temperature under another scale. It contains a raisetemp () method to demonstrate how the object properties are modified.
The following code demonstrates how to use an object in an HTML document:
<script language= "JavaScript" >
Create an object instance
A = new thermometer (98.6, "F");
Access Object Properties
Alert ("Temperature in Fahrenheit" + A.DEGREESF);
Alert ("Temperature in Celsius" + A.degreesc);
Execute Object Methods
A.raisetemp (10);
Alert ("Temperature in Fahrenheit" + A.DEGREESF);
Alert ("Temperature in Celsius" + A.degreesc);
</script>
　　
Six. Passing Object parameters
You can also pass an object to another object, just as you can pass an argument to an object. Take a look at the following example, which contains two object constructors, and the second is set to receive an object as a parameter: