JavaScript implementiert das Runden auf die dritte Dezimalstelle

var Expensevalue = (document.getElementById("edt_0_Expense").value).toString()

point = Expensevalue.indexOf(".");
//edt_0_Expense.value;
zuletzt = Punkt + 2;
rund = Punkt + 3;
lastvalue = parseInt(expensevalue.substr(last,1));
if (parseInt(expensevalue.substr(round,1)) >= 5)
lastvalue = parseInt(expensevalue.substr(last,1)) + 1;

Expensevalue.substr

Last

) + LastValue.toString()

;