<script type="text/javascript">
function startCalc(){
interval = setInterval("calc()",2);
}
function calc(){
ytl_bir = document.frm.parca1_tutar_ytl.value;
ytl_iki = document.frm.parca2_tutar_ytl.value;
ytl_uc = document.frm.parca3_tutar_ytl.value;
ytl_dort =...