07QR1DQ3OC15

01/css/style.css

@@ -7,10 +7,7 @@
 .content {
     width: 100%;
     max-width: 960px;
-    display: flex;
-    justify-content: center;
-    align-items: center;
-    flex-direction: column;
+    margin: 0 auto;
 }
 
 .content h1 {

01/script.js

@@ -1,13 +1,27 @@
 const workingHours = 8; // Number of working hours a day
-let workingDays = +prompt("Enter working days number ", ""); // Number of working days in a month
-while (workingDays == null || workingDays == "" ) {
+// let workingDays = +prompt("Enter working days number ", ""); // Number of working days in a month
+let workingDays = checkNan("Enter working days number");
+let checkPrompt = isFinite(workingDays);
+
+function checkNan(title) {
+    const workingDays = +prompt(title, ""); // Number of working days in a month
+    return workingDays;
+}
+
+while (isNaN(workingDays) === true ) {
     alert("Working days should be a number");
+    workingDays = checkNan("Enter working days number");
 }
 
 let totalHoursInMonth = workingHours * workingDays;
 alert(`Your Total hours this month = ${totalHoursInMonth}`);
 
-let sallary = +prompt("Enter sallary you've got this month ", ""); // Sallary for month
+let sallary = checkNan("Enter sallary you've got this month"); // Sallary for month
+while (isNaN(sallary) === true ) {
+    alert("Sallary should be a number");
+    sallary = checkNan("Enter working days number");
+}
+
 let rate = sallary / totalHoursInMonth; // Rate per hour
 alert(`Your rate this month was ${rate}`);
 
@@ -17,7 +31,7 @@ let login = prompt('Enter login', 'default');
 if (login == 'admin') {
     let password = prompt('Password', 'Enter password');
     if (password == 'qwerty') {
-        alert('Hello Admin', "background: green;");
+        alert('Hello Admin', "background: green;");  // I used console.log when I started to write this code. So background doesn't work with alert
     } else if (password == '' || password == null) {
         alert('Wrong password');
     } else {