Character Increment Decrement

HTML

<div onclick="minus()"> - </div><span id="value"></span><div onclick="plus()"> + </div>

CSS

div{display: inline-block; width: 30px; background-color: red;}
span{display: inline-block; width: 50px;}
*{text-align:center}

JavaScript

var value = 65; // A

function displayValue() {
    $('#value').html(String.fromCharCode(value));
}

displayValue();

function plus(){
    if(value < 90){
       value = value + 1;
       displayValue();
    }
}

function minus(){
    if(value > 65){
         value = value - 1;
         displayValue();
    }
}