Calculator

HTML5+Bootstrap+Js Calculator mini-app

HTML

<link rel="stylesheet" href="https://netdna.bootstrapcdn.com/bootstrap/3.0.2/css/bootstrap.min.css">
<script src="https://netdna.bootstrapcdn.com/bootstrap/3.0.2/js/bootstrap.min.js"></script>
<div onkeypress="keypress(event)" style="max-width:550px">

<table class="table table-bordered table-condensed">
    <tr class=active><h1 id=result class="text-right" disabled style="background:gray;color:cyan">0</h1>
    <tr class=active>
        <td><button class="btn btn-danger btn-lg" onmousedown="allclear()"><span class="glyphicon glyphicon-off"></span></button>
        <td><button class="btn btn-danger btn-lg" onmousedown="clearentry()"><span class="glyphicon glyphicon-refresh"></span></button>
        <td><button class="btn btn-warning btn-lg" onmousedown="backspace()"><span class="glyphicon glyphicon-arrow-left"></span></button>
        <td><button class="btn btn-primary btn-lg" onmousedown="divide()">÷</button>

    <tr class=active>
        <td><button class="btn btn-info btn-lg" onmousedown="seven()">7</button>
        <td><button class="btn btn-info btn-lg" onmousedown="eight()">8</button>
        <td><button class="btn btn-info btn-lg" onmousedown="nine()">9</button>
        <td><button class="btn btn-primary btn-lg" onmousedown="multiply()"><span class="glyphicon glyphicon-remove"></span></button>

    <tr class=active>
        <td><button class="btn btn-info btn-lg" onmousedown="four()">4</button>
        <td><button class="btn btn-info btn-lg" onmousedown="five()">5</button>
        <td><button class="btn btn-info btn-lg" onmousedown="six()">6</button>
        <td><button class="btn btn-primary btn-lg" onmousedown="subtract()"><span class="glyphicon glyphicon-minus"></span></button>

    <tr class=active>
        <td><button class="btn btn-info btn-lg" onmousedown="one()">1</button>
        <td><button class="btn btn-info btn-lg" onmousedown="two()">2</button>
        <td><button class="btn btn-info btn-lg" onmousedown="three()">3</button>
       ...