jQuery: Stop decrementing textbox value if value equals 0

What I have:

I have a readonly textbox and two links. The first link increments the value of the textbox by 1 whereas the second link decrements the value by 1.

What I need:

I need the textbox value to stop decrementing at zero (I don't want negative numbers).

My code:

jQuery:

jQuery(".increment").on('click',function(){
    jQuery(this).next(".amount input").val(parseInt(jQuery(this).next(".amount input").val())+1);
});

jQuery(".decrement").on('click',function(){
    jQuery(this).prev(".amount input").val(parseInt(jQuery(this).prev(".amount input").val())-1);
});

Note: .next and .prev are used because I have multiple textboxes.

HTML:

<!--This block of code is occurs more than once.-->
<td class="amount">
    <a href="#" class="increment"></a>
    <input type="text" readonly="readonly" value="0" />
    <a href="#" class="decrement"></a>
</td>

A loose guess:

...with regards to decrementing...

// open onclick code here

    if (jQuery(this).prev(".amount input").val != "0"){

        // decrement code here

    }

// close onclick code here

Resources:

My working code is modelled on this Stack Overflow answer: http://stackoverflow.com/a/12209831/835950

...at which a fiddle exists for convenience: http://jsfiddle.net/iMaverick/S3PLG/2/

Answers


Demo

$("#down").on('click',function(){
    var value = (parseInt($("#incdec input").val() , 10) - 1);
    $("#incdec input").val((value-1) < 0 ? 0 :(value -1));
});

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