<script>
    function wytnij()
    {
        var text1 = document.getElementById('t1');
        var text2 = document.getElementById('t2');
        text2.value = text1.value.slice(0, 1);
    }
    function wytnij_ost()
    {
        var text1 = document.getElementById('t1');
        var text2 = document.getElementById('t2');
        text2.value = text1.value.slice(-1);
    }
    function piersze_slowo()
    {
        var text1 = document.getElementById('t1');
        var text2 = document.getElementById('t2');
        var x = text1.value.split(" ");
        text2.value = x[0];
    }

    function wspak()
    {
        var text1 = document.getElementById('t1');
        var text2 = document.getElementById('t2');
        var x = "";
        for (i=0; i<=text1.value.length-1; i++)
        {
            x=text1.value[i]+x;
        }
        text2.value = x;
    }

</script>

<form>
    <p>T1: <input type="text" id="t1"></p>
    <p>T2: <input type="text" id="t2"></p>
    <p><input type="button" value="Skopiuj pierwszy znak" onclick="wytnij()"></p> 
    <p><input type="button" value="Skopiuj ostatni znak" onclick="wytnij_ost()"></p>
    <p><input type="button" value="Pierwsze słowo" onclick="piersze_slowo()"></p>
    <p><input type="button" value="Wspak" onclick="wspak()"></p>
</form>