How do i remove all characters in a string Javascript?

Question

I have a form that sends money value e.g

<input type="text" name="amount" value="N50,000.00 NGN" />
<input type="button" value="submit">

I want to remove all characters in the amount field leaving only the numbers in this format;

<input type="text" name="amount" value="50000" />
<input type="button" value="submit">

what is the best method to do this with javascript?

Answer 1

first think you want to do is to strip the string or value from numbers using something like this

<input type="text" name="amount" value="N50,000.00 NGN" />
<input type="button" value="submit">



var amount =  $('input[name=amount]').val().replace(/[A-Za-z$-]/g, "");
   amount=amount.replace(",", "");
   amount=parseInt(amount).toFixed(0);

here is a working example

http://jsfiddle.net/C69u4/

Answer 2

Use

Number('N50,000.00 NGN'.replace(/[a-z, ]/gi,''));

If you want only the integer part, use:

parseInt(Number('N50,000.00 NGN'.replace(/[a-z, ]/gi,'')),10);

The replace part removes all alphabetic characters, the comma and spaces from the string first.

Answer 3

try this

 var i = "N50,000.00 NGN";
 parseInt(i.replace(/[^\d\.]/gi, ""), 10);

online example : http://jsbin.com/ojumir

Answer 4

You could try going through the string and take the characters that are digits and append them to a result string. I don't know if that's the best method, but it's one that works.

var res = "";
for (var c in str) { if (str[c].match(/\d/)) { res += str[c];  }  }

Answer 5

Try this

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

        function doWork() {
            var amount = document.getElementsByName('amount');
            var str = amount[0].value;
            var temp = '';
            for (i = 0; i < str.length; i++) {
                if (!isNaN(str[i]))
                    temp += str[i];
            }
            amount[0].value = temp;
        }
    </script>

<input type="text" name="amount" value="N50,000.00 NGN" />
<input type="button" value="submit" onclick="doWork();">

Answer 6

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

    function doWork() {
        var amount = document.getElementsByName('amount');
        amount[0].value = parseInt(amount[0].value.replace(/[^0-9.]/g, "")).toFixed(0);
    }
</script>

<input type="text" name="amount" value="N50,000.00 NGN" />
<input type="button" value="submit" onclick="doWork();">