Input String, return Number to test null?

I have a problem with my current code. I am trying to test the number for null and if it is, it will cancel my loop. It seems to cancel with the current way i have it, but i need the number to add up with the previous one each time it loops. How can i test for null to cancel, while getting my number to add up?

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 <html>

<head>

    <script type="text/javascript"> 
 
    function nameInput() {

    var nameIn; 

        nameIn = prompt("Enter the Employees name.");
 
        while(nameIn !== null &&(!isNaN(nameIn) || nameIn=="")) {
 
        alert("Name cannot be Blank.\n must contain only LETTERS");

        nameIn =prompt("Try again, Enter the employees name.");

}    
 
    return nameIn;    

}
 
        function hoursInput() {
 
    var numIn=prompt("Enter the Hours worked for the Week");
 
        while(numIn !== null && (isNaN(numIn) || numIn=="")) {
 
        alert("Hours cannot be Blank.\n must contain only NUMBERS.");
 
        numIn=prompt("Try again, Enter the Hours worked for the Week");
 
    }
 
    return numIn;    

}
 
</script>

</head>

<body>

<script type="text/javascript">
 
// DECLARATION

var wage =10;

var totalHours=0;

var totalEarnings=0;

var    Earnings;
 
// PROCESSING LOOP

var howMany = parseFloat(prompt(" How many employees are you inputting?", ""));
 
for (var loopControl = 1; loopControl <= howMany; ++loopControl) {
 
    var nameth=nameInput();

        if(nameth==null){

            break;

}
 
    var hour=hoursInput();
 
        if(hour==null){

            break;

}
 
            Earnings = hour * wage;

            totalHours+=hour

            totalEarnings+=Earnings;
 
            document.write("Name of employee. "   + nameth + "<br /br>");

            document.write("This employee worked. "  + hour + "<br /br>" + "<br /br>");
 
}
 
// OUTPUT
 
document.write("compiled Earnings is: " + totalEarnings + " " + "<br /br>");

document.write("total amount of hours from all employees listed are: " + totalHours + " " + "<br /br>");
 
</script>

</body>

</html>

Nov 12 '13 #1

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