<table border="1"><tbody><tr><th colspan="2">Lay-Back-Umrechnung</th></tr><tr><td><input onkeyup="if(document.lay_back.input.value.indexOf(',' != -1)) document.lay_back.input.value = document.lay_back.input.value.replace(/,/,'.'); if(!(parseFloat(document.lay_back.input.value) > 1)) { document.lay_back.erg.value = -1; document.getElementById('proz').innerHTML = -1; } else { document.lay_back.erg.value = document.lay_back.input.value / (document.lay_back.input.value - 1); document.getElementById('proz').innerHTML = Math.round(100 / document.lay_back.input.value); } return true;" style="padding-right: 3px; padding-left: 3px; background-color: rgb(232, 255, 173); text-align: right;" tabindex="7" maxlength="9" size="7" value="1.32" name="input"> (76%) als Lay/Back </td><td> entspricht <input style="padding-right: 3px; padding-left: 3px; text-align: right;" readonly="readonly" size="5" value="4.124999999999999" name="erg"> als Back/Lay </td></tr></tbody></table>
geht auch:mrgreen: