Validate a number : Validation : Form Control JAVASCRIPT DHTML TUTORIALS

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Validate a number



function processNumber(inputField) {
    try {
        var inpVal = parseInt(inputField.value, 10);
        if (isNaN(inpVal)) {
            var msg = "Please enter a number only.";
            var err = new Error(msg);
            if (!err.message) {
                err.message = msg;
            }
            throw err;
        }
    } catch (e) {
        alert(e.message);
        inputField.focus();
        inputField.select();
    }
}