suvat

<script>
function select(){
//find which variable is missing and select suvat accordingly
}

</script>
<h1>Suvat calculator</h1>
Distance:<input type="text" id="s"/><br />
Initial velocity<input type="text" id="u"/><br />
Eventual velocity<input type="text" id="v"/><br />
Acceloration<input type="text" id="a"/><br />
Time<input type="text" id="t"/><br />
<input type="button" value="calculate" />
<x id="answer"> </x>