New Perspectives on HTML5, CSS3, and JavaScript
New Perspectives on HTML5, CSS3, and JavaScript
6th Edition
ISBN: 9781305503922
Author: Patrick M. Carey
Publisher: Cengage Learning
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Chapter 9, Problem 13CP4
Program Plan Intro

Tochange the initial value of the minsLeft and secsLeft variables and set them to 30 and 0 respectively in file ph_clock.js.

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Event Listeners Go to the co_cart.js file in your editor. Directly below the initial comment section, add an event listener for the window load event that does the following when the page is loaded: Runs the calcCart() function. Add an event handler to the modelQty field in the cart form that runs the calcCart() function when the field value is changed. A for loop that loops through every option in the group of shipping option buttons, adding an event handler to run the calcCart() function when each option button is clicked. JavaScript Functions Create the calcCart() function to calculate the cost of the customer’s order using field values in the cart form. Within the calcCart() function do the following: Create a variable named orderCost that is equal to the cost of the espresso machine stored in the modelCost field multiplied by the quantity of machines ordered as stored in the modelQty field. Display the value of the orderCost variable in the orderCost field, formatted as U.S.…
Event Listeners Return to the mas_register.js file in your editor. Directly below the initial comment section, insert an event listener for the window load event. Run an anonymous function in response to the event containing the following commands: Call the calcCart() function (which you will create shortly.) Create an onclick event handler for the regSubmit button that runs the sessionTest() function when the button is clicked. Create onblur event handlers for the input boxes with the ids: fnBox, lnBox, groupBox, mailBox, phoneBox, and banquetBox, running the calcCart() function in response to each event. Create an onchange event handler for the sessionBox selection list, running the calcCart() function when the selection list is changed. Create an onclick event handler for the mediaCB check box, running the calcCart() function in response. JavaScript Functions Create the sessionTest() function. The purpose of this function is to provide a validation test for the conference session…
Event Listeners Go to the co_credit.js file in your editor. Create an event listener for the window load event that retrieves the field values attached to the query string of the page’s URL. Add the following to the event listener’s anonymous function: Create the orderData variable that stores the query string text from the URL. Slice the orderData text string to remove the first ? character, replace every occurrence of the + character with a blank space, and decode the URI-encoded characters. Split the orderData variable at every occurrence of a & or = character and store the substrings in the orderFields array variable. Write the following values from the orderFields array into the indicated fields of the order form: orderFields[3] into the modelName field orderFields[5] into the modelQty field orderFields[7] into the orderCost field orderFields[9] into the shippingType field orderFields[13] into the shippingCost field orderFields[15] into the subTotal field orderFields[17]…
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