{input {@ id="input" type="text" value="0"}}
{input {@ type="button" value="increment"
          onclick="document.getElementById('input').value =
                   parseInt( document.getElementById('input').value ) + 1;"}}
{input {@ type="button" value="random"
          onclick="if (confirm( 'yes?' ))
                       document.getElementById('input').value =
                       Math.round(Math.random()*100);"}}