jquery only allow input float number

Question

i\'m making some input mask that allows only float number. But current problem is I can\'t check if multiple dots entered. Can you check those dots and prevent it for me?

Answer 1

HTML

Javascript

function isFloatNumber(item,evt) {
    evt = (evt) ? evt : window.event;
    var charCode = (evt.which) ? evt.which : evt.keyCode;
    if (charCode==46)
    {
        var regex = new RegExp(/\./g)
        var count = $(item).val().match(regex).length;
        if (count > 1)
        {
            return false;
        }
    }
    if (charCode > 31 && (charCode < 48 || charCode > 57)) {
        return false;
    }
    return true;
}

jsfiddle.net