Mobile Javascript Different Results then Desktop

I Have a Form That Uses a Generic Bluetooth Scanner that pastes the numeric barcode into the text field.

If I Test it out and scan a text barcode it converts it to a number on a tablet. On The Desktop it does what I have it programmed to do and error out. I'm confused by it.

I use Chrome on Both the Desktop and on the Tablet. Any Help Appreciated.

Here is my JS Function:

function isNumeric(num) {
    return !isNaN(parseInt(num));
}
var success = new Audio('../templates/success.mp3');
var error = new Audio('../templates/error.mp3');


function check_bin() {
    var bin = document.getElementById("bin").value;
    document.getElementById("alert_move_bin").className = "";
    document.getElementById("alert_move_bin").innerHTML = "";
    document.getElementById("bin_group").className = "form-group";
    document.getElementById("barcode_group").className = "form-group";

    if (isNumeric(bin) == true) {

        if (bin < 15 || bin > 6000) {
            document.getElementById("bin_group").className = "form-group has-error";
            document.getElementById("sub").disabled = true;
            document.getElementById("bin").value = "";
            document.getElementById("bin").focus();
            error.play();

            return false;
        } else {
            document.getElementById("bin_group").className = "form-group has-success";
            document.getElementById("sub").disabled = false;
            document.getElementById("location").focus();
            return false;
        }

    } else {
        error.play();
        document.getElementById("bin_group").className = "form-group has-error";
        document.getElementById("sub").disabled = true;
        document.getElementById("bin").value = "";
        document.getElementById("bin").focus();
    }

}

HTML

<!-- Text input-->
<div class="form-group" id="bin_group">
    <label class="control-label" for="bin">Bin Number</label>  
    <input data-fv-onsuccess="bin_success" data-fv-onerror="bin_error" data-fv-onsuccess="onFieldSuccess" data-fv-stringlength="true" data-fv-stringlength-max="4" data-fv-stringlength-message="The bin number must be more than 2 and less than 4 numbers long" data-fv-stringlength-min="2" data-fv-notempty="true" data-fv-notempty-message="The Bin # is required" id="bin" name="bin" type="number" placeholder="" class="form-control nput-lg bigger_text" autofocus>
</div>
<!-- Text input-->
<div class="form-group" id="barcode_group">
    <label class="control-label" for="location">Bin Location</label>  
    <input onpaste="bin_location_changed();" onchange="bin_location_changed();" data-fv-notempty="true" data-fv-notempty-message="The New Bin Location is required" id="location" name="location" type="text" placeholder="" class="form-control nput-lg bigger_text">
</div>