räknare

gistfile1.txt

<p>Antal kvadrat: </p> <input name="Antal kvadrat" id="squaremeeters" type="text" /> <br />
Summa:<p id="sum"></p>
Summa: (RUT) <p id="sumrut"></p>


$('#squaremeeters').keyup(calculate);

function calculate(e) {
    var maths = $('#squaremeeters').val() * 50 ;
    $('p#sum').text(maths);
    var maths = $('#squaremeeters').val() * 25 ;
    $('p#sumrut').text(maths);
}