Input String, return Number to test null?

**fingersnark** · Nov 12 '13, 07:06 PM

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?

Code:

<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>