This the original js code unmodified and the complete question. 1. Use your code editor to open the project04-01_txt.html and project04-01_txt.js files from the js04 |project01 folder. Enter your name and the date in the comment section of each file and save them asproject04-01.html and project04-01.js, respectively.2. Go to the project04-01.html file in your code editor and in the head section add a script element to load theproject04-01.js file, deferring the loading of the program until the web page finishes loading. Study the contentsof the HTML to become family with the elements and the ids associated with each element. Save your changesto the file.3. Go to the project04-01.js file in your code editor. At the top of the file above the comment section, insert astatement that indicates this program adheres to a strict interpretation of JavaScript syntax.4. There are two logic errors in setting up the global constants. Locate and fix those errors.5. Go to the calcTotal() function. To guard against users entering a zero or negative value for the estimatedweight, replace the statement totalCost += wgtBox.value * COST_PER_LB; with a try catchstatement that does the following:a. Tests whether wgtBox.value is not greater than 0 by using the expression ! (wgtBox.value 0). Ifthat expression is true, throw an exception with the error message “!! Enter a positive weight"b. If no exception is thrown then run the command totalCost += wgtBox.value * COST_PER_LB;.c. If an exception is caught, set the value of msgBox.innerHTML to the error message you defined for thethrown exception.6. Repeat Step 5, for the estimated distance cost using distBox. value. Throw the error message “!! Enter apositive mileage" for a caught exception.7. Save your changes to the file.8. Open the project04-01.html file in your web browser. Open the debugger and confirm that there are no syntaxerrors. If there are, fix your code in your code editor.9. Test your code by entering 0 for the estimated weight and 1200 for the mileage. Confirm that the error message"! Enter a positive weight" appears next to the total box.10. Change the weight to 2500 and enter a 0 for the estimated mileage. Confirm that the error message “! Enter apositive mileage" appears next to the total box.11. Enter a mileage of 1200 miles and click the Setup and Installation box. Confirm that the estimated moving cost iscalculated to be $2650. 1"use strict";2 v /*JavaScript 7th Edition3Chapter 44Project 04-01Application to calculate total moving cost7Author:8Date:910Filename: project04-01.js11*/1213// Global Constants14const COST_PER_LB= 50;15const COST_PER_MILE = 75;16const SETUP_COST = 500;17// Global Variableslet wgtBox = document.getElementById("wgtBox");let distBox = document.getElementById("distBox");let msgBox = document.getElementById("msgBox");181920212223// Event Handlersdocument.getElementById("wgtBox").onchange = calcTotal;document.getElementById("distBox").onchange = calcTotal;document.getElementById("setupBox").onclick = calcTotal;2425262728// Function to calculate an estimate of the total moving cost30 v function calcTotal()2931let totalCost = 0;// Set the initial estimate to $032msgBox.innerHTML =// Erase any warnings in the message box333435totalCost += wgtBox.value * COST_PER_LB;363738totalCost += distBox.value * COST_PER_MILE;3940if (document.getElementById("setupBox").checked) {|totalCost += SETUP_COST41 v4243}4445// Display the moving cost estimate in the totalBox, formatted as currency46document.getElementById("totalBox").innerHTML = formatCurrency(totalCost);47484950// Function to display a numeric value as a text string in the format $##.##function formatCurrency(value) {5152 v53return "$" + value.toFixed(2);54}

Question

This the original js code unmodified and the complete question. 1. Use your code editor to open the project04-01_txt.html and project04-01_txt.js files from the js04 |project01 folder. Enter your name and the date in the comment section of each file and save them asproject04-01.html and project04-01.js, respectively.2. Go to the project04-01.html file in your code editor and in the head section add a script element to load theproject04-01.js file, deferring the loading of the program until the web page finishes loading. Study the contentsof the HTML to become family with the elements and the ids associated with each element. Save your changesto the file.3. Go to the project04-01.js file in your code editor. At the top of the file above the comment section, insert astatement that indicates this program adheres to a strict interpretation of JavaScript syntax.4. There are two logic errors in setting up the global constants. Locate and fix those errors.5. Go to the calcTotal() function. To guard against users entering a zero or negative value for the estimatedweight, replace the statement totalCost += wgtBox.value * COST_PER_LB; with a try catchstatement that does the following:a. Tests whether wgtBox.value is not greater than 0 by using the expression ! (wgtBox.value > 0). Ifthat expression is true, throw an exception with the error message “!! Enter a positive weight&#34;b. If no exception is thrown then run the command totalCost += wgtBox.value * COST_PER_LB;.c. If an exception is caught, set the value of msgBox.innerHTML to the error message you defined for thethrown exception.6. Repeat Step 5, for the estimated distance cost using distBox. value. Throw the error message “!! Enter apositive mileage&#34; for a caught exception.7. Save your changes to the file.8. Open the project04-01.html file in your web browser. Open the debugger and confirm that there are no syntaxerrors. If there are, fix your code in your code editor.9. Test your code by entering 0 for the estimated weight and 1200 for the mileage. Confirm that the error message&#34;! Enter a positive weight&#34; appears next to the total box.10. Change the weight to 2500 and enter a 0 for the estimated mileage. Confirm that the error message “! Enter apositive mileage&#34; appears next to the total box.11. Enter a mileage of 1200 miles and click the Setup and Installation box. Confirm that the estimated moving cost iscalculated to be $2650. 1&#34;use strict&#34;;2 v /*JavaScript 7th Edition3Chapter 44Project 04-01Application to calculate total moving cost7Author:8Date:910Filename: project04-01.js11*/1213// Global Constants14const COST_PER_LB= 50;15const COST_PER_MILE = 75;16const SETUP_COST = 500;17// Global Variableslet wgtBox = document.getElementById(&#34;wgtBox&#34;);let distBox = document.getElementById(&#34;distBox&#34;);let msgBox = document.getElementById(&#34;msgBox&#34;);181920212223// Event Handlersdocument.getElementById(&#34;wgtBox&#34;).onchange = calcTotal;document.getElementById(&#34;distBox&#34;).onchange = calcTotal;document.getElementById(&#34;setupBox&#34;).onclick = calcTotal;2425262728// Function to calculate an estimate of the total moving cost30 v function calcTotal()2931let totalCost = 0;// Set the initial estimate to $032msgBox.innerHTML =// Erase any warnings in the message box333435totalCost += wgtBox.value * COST_PER_LB;363738totalCost += distBox.value * COST_PER_MILE;3940if (document.getElementById(&#34;setupBox&#34;).checked) {|totalCost += SETUP_COST41 v4243}4445// Display the moving cost estimate in the totalBox, formatted as currency46document.getElementById(&#34;totalBox&#34;).innerHTML = formatCurrency(totalCost);47484950// Function to display a numeric value as a text string in the format $##.##function formatCurrency(value) {5152 v53return &#34;$&#34; + value.toFixed(2);54}

Accepted Answer

I have changed the estimated weight cost & mileage cost values under a try-catch block and…