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October 16th, 2010, 06:31 PM
#1
calculating the total value of numbers in a textarea
I have some code that gives me the sum of numbers in a textarea (see below), but it only works on the first line and if there are more then one spaces between numbers it gives an error.
I basically want it to give me the sum of all numbers in the textare irrespective of spaces between them or lines separating them.
Any help will be apreciated
</html>
<head>
<meta http-equiv='Content-type' content='text/html;charset=UTF-8'>
<title>Calc Numbers</title>
<script type='text/javascript'>
function calc() {
// calc() is designed to sum numbers entered in an input field
var t = document.getElementById("num").value; // the numbers entered
var numbers = new Array();
numbers = t.split(' '); // the numbers extracted from the string
var sum = 0; // variable to hold the sum of the numbers
var num = ''; // string to hold a list of the numbers
if (numbers.length == 1) { num = '0'; } // to add single number to
for (i = 0; i < numbers.length; i++) {
sum = sum + eval(numbers[i]); // add this number
if (i == numbers.length - 1) { num = num + " and ";} // last number?
else { if (i > 0) { num = num + ", "} } // otherwise if not 1st, join with ,
num = num + numbers[i]; // and add the number to the list
}
// create the text to display with the result
result = "<p>The sum of the numbers " + num + " is " + sum +"<"+"/p>";
// find the placeholder for displaying the result
var resElement = document.getElementById("res");
// display the result
resElement.innerHTML = result;
}
</script>
</head>
<body>
<h1>Calc Numbers</h1>
<p>Enter some numbers separated by spaces:</p>
<textarea id='num' onclick="this.value=''" onchange='calc()' cols = 65 rows = 5 wrap="PHYSICAL"></textarea>
<!-- provide a dummy button - encourage user to leave input tag -->
<input type="button" value="Calc">
<!-- the following div id='res' provides a placeholder
that calc() can use to display the result -->
<div id='res'></div>
</body>
</html>
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October 17th, 2010, 07:06 AM
#2
Re: calculating the total value of numbers in a textarea
This is a Java forum not a javascript forum. Try posting on the client side scripting forum.
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