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JavaScript var not being recognized as a number

I have an HTML div, which I use JavaScript to retrieve the value from, as below:

    var oCreditStatus = document.getElementById('creditStatusField');

    var oOrigValue = oCreditStatus.value;

var oOrigValue will always be a number, and sometimes 0 (Zero).

I now want to increment or decrement the number by 1. However, when I do the following:

var oNewValue = oCreditStatus.value + 1;

I get the value 01, then 011, which is wrong as I want 1,2.

I know it is not recognizing it as a number, but how do I get it to do so.

Solution

  • You can't. Javascript engine will read it as a text/string. You've to use following code:

    Edit. Use a radix (base 10) Thanks to @James for revision.

    var oCreditStatus = document.getElementById('creditStatusField');

var oOrigValue = parseInt(oCreditStatus.value, 10); // use parseFloat for decimal.