<head>
<script>


</script>
</head>


 <form>
        <input type="checkbox" id="bk" name="vehicle" onClick="checkbox();" value="Bike">I have a bike<br></br>
        <input type="checkbox" id="cr" name="vehicle" onClick="checkbox();" value="Car">I have a car<br></br> 
        <input type="text" id="show" name="vehicle"><br>
        <input type="submit" value="Show">
    </form> 