function document_onkeydown(event) { var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode; if (keyCode == 13) { event.returnValue=false; event.cancel = true; return false; } else{ return true; } } function test_func() { if ((document.Form1.ACCORDATO.value != "") && (document.Form1.TASSO.value != "") && (document.Form1.COMMISSIONE.value != "") && (document.Form1.SPESE.value != "") && (document.Form1.ALTRESPESE.value != "")) { var3 = Number(document.Form1.TASSO.value) var2 = var3/100; var4 = Number(document.Form1.ACCORDATO.value) var10 = Number(document.Form1.COMMISSIONE.value) var5= Math.pow((1 + var2),3/12) interesse2 = (var5 -1)*var4 oneri2 = (Number(document.Form1.SPESE.value) + Number(document.Form1.ALTRESPESE.value))/4 + (var4/100)*var10 var media2 = var4 var11 = (Math.pow(((media2 + oneri2 + interesse2)/media2),4) -1)*100 var11 = Math.round(var11 * 1000)/1000 document.Form1.ISC.value =var11 + " %" document.Form1.RESET.style.display="" } else { alert("Inserire tutte le informazioni richieste") document.Form1.ISC.value ="" } } function reset() { document.Form1.ACCORDATO.value = "" document.Form1.TASSO.value = "" document.Form1.COMMISSIONI.value = "" document.Form1.SPESE.value = "" document.Form1.ALTRESPESE.value = "" document.Form1.RESET.style.display = "none" } function onlynumber(field) { if (isNaN(field.value)) { alert("Solo valori numerici!"); field.value=field.value.substr(0, field.value.length-1); } }