Specifications

Write a function 103
Write a function
A function is a script that you can use repeatedly to perform a specific task.
You can pass parameters to a function, and it can return a value. In this
lesson, every time your user clicks the Calculate button, a function will run
that multiplies data in the input text fields and returns values in the
dynamic text fields. You’ll write that function now.
1. In the Script pane, with the insertion point after the ActionScript that
reads
qty3_txt.text = 0;, press Enter (Windows) or Return
(Macintosh) twice and type the following comment:
//Calculate quantity times price.
2.
Press Enter or Return and type the following to create a function that
runs when the playhead enters Frame 1, where you’re attaching
the script:
this.onEnterFrame = function (){
3.
Type the following ActionScript to specify how the function should
multiply the values in the input text fields for the airplane:
price1_txt.text = Number (qty1_txt.text)*Number
(priceCD);
price1_txt
is the instance name that you gave to the top price input
text field on the Stage.
.text defines the text that should appear in the text field, which is the
number of parts multiplied by the cost of the part: the $320 that you
set as the value for the
priceCD variable.
4. Press Enter or Return, and type the following two lines:
price2_txt.text = Number (qty2_txt.text)*Number
(priceShocks);
price3_txt.text = Number (qty3_txt.text)*Number
(priceCover);
};
Your function should appear as follows:
//Calculate quantity times price.
this.onEnterFrame = function (){
price1_txt.text = Number (qty1_txt.text)*Number
(priceCD);
price2_txt.text = Number (qty2_txt.text)*Number
(priceShocks);
price3_txt.text = Number (qty3_txt.text)*Number
(priceCover);
};