1
2
3 function FormataReais(fld, milSep, decSep, e) {
4 var sep = 0;
5 var key = '';
6 var i = j = 0;
7 var len = len2 = 0;
8 var strCheck = '0123456789';
9 var aux = aux2 = '';
10 var whichCode = (window.Event) ? e.which : e.keyCode;
11 if (whichCode == 13) return true;
12 key = String.fromCharCode(whichCode); // Valor para o código da Chave
13 if (strCheck.indexOf(key) == -1) return false; // Chave inválida
14 len = fld.value.length;
15 for(i = 0; i < len; i++)
16 if ((fld.value.charAt(i) != '0') && (fld.value.charAt(i) != decSep))
17 break;
18 aux = '';
19 for(; i < len; i++)
20 if (strCheck.indexOf(fld.value.charAt(i))!=-1) aux += fld.value.charAt(i);
21 aux += key;
22 len = aux.length;
23 if (len == 0) fld.value = '';
24 if (len == 1) fld.value = '0'+ decSep + '0' + aux;
25 if (len == 2) fld.value = '0'+ decSep + aux;
26 if (len > 2) {
27 aux2 = '';
28 for (j = 0, i = len - 3; i >= 0; i--) {
29 if (j == 3) {
30 aux2 += milSep;
31 j = 0;
32 }
33 aux2 += aux.charAt(i);
34 j++;
35 }
36 fld.value = '';
37 len2 = aux2.length;
38 for (i = len2 - 1; i >= 0; i--)
39 fld.value += aux2.charAt(i);
40 fld.value += decSep + aux.substr(len - 2, len);
41 }
42 return false;
43 }
Then use in the form field:
1 onkeypress="return(FormataReais(this,'.',',',event))"