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The function formatCurrency is used to auto-format a numeric value with thousands separators and a decimal separator.
It works, but still has the following problems:
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Problem 1.
The function automatically inserts the decimal separator
[code]
onKeyPress=”return(currencyFormat(this,’,’,’.’,event))” //(where ‘.’ is the decsep)
This is a problem because when a user tries to write 1000 (one thousand) it is formatted as 10.00.
I need to modify the function so that it inserts the digit decSep only when the user digits the decSep key.
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Problem 2.
As it is the function only supports numbers with two decimals, but it would be useful to pass the decimal position as an argument of the function itself.
I tried to add the argument decSepPos (decimal separator position)
and modify the function in these way:
Line 7:
[code]
function currencyFormat(fld, milSep, decSep, e) {
Becomes
[code]
function currencyFormat(fld, milSep, decSep, decSepPos, e) {
line 44:
[code]
fld.value += decSep + aux.substr(len – 2, len);
becomes
[code]
fld.value += decSep + aux.substr(len – decSepPos, len);
————–
line 59:
[code]
onKeyPress=”return(currencyFormat(this,’,’,’.’,event))”>
becomes
[code]
onKeyPress=”return(currencyFormat(this,’,’,’.’,’3′,event))”>
This modification works well, but only when decSepPos is >=2.
If the passed value is 1 or 0 the function stops working well.
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Problem 3.
In firefox the TAB key does not work (while it works in ie).
This implies not to be able to switch from a textbox to another object using the tab key.I tried to add line 16 the following line:
[code]
if (whichCode == 9) return true; // (9 is the keycode of TAB key)
Without obtaining any result.
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Here is the sample page I’im working on
Thanks to everybody will support me on one or more of these problems.
Paolo
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[code]
<HTML>
<HEAD>
<SCRIPT LANGUAGE=”JavaScript”>
function currencyFormat(fld, milSep, decSep, e) {
var sep = 0;
var key = ”;
var i = j = 0;
var len = len2 = 0;
var strCheck = ‘0123456789’;
var aux = aux2 = ”;
var whichCode = (window.Event) ? e.which : e.keyCode;
if (whichCode == 13) return true; // Enter
if (whichCode == 8) return true; // Delete
key = String.fromCharCode(whichCode); // take the key from keycode
if (strCheck.indexOf(key) == -1) return false; // Unvalid key
len = fld.value.length;
for(i = 0; i < len; i++)
if ((fld.value.charAt(i) != ‘0’) && (fld.value.charAt(i) != decSep)) break;
aux = ”;
for(; i < len; i++)
if (strCheck.indexOf(fld.value.charAt(i))!=-1) aux += fld.value.charAt(i);
aux += key;
len = aux.length;
if (len == 0) fld.value = ”;
//if (len == 1) fld.value = ‘0’+ decSep + ‘0’ + aux;
//if (len == 2) fld.value = ‘0’+ decSep + aux;
if (len > 2) {
aux2 = ”;
for (j = 0, i = len – 3; i >= 0; i–) {
if (j == 3) {
aux2 += milSep;
j = 0;
}
aux2 += aux.charAt(i);
j++;
}
fld.value = ”;
len2 = aux2.length;
for (i = len2 – 1; i >= 0; i–)
fld.value += aux2.charAt(i);
fld.value += decSep + aux.substr(len – 2, len);
}
return false;
}
</script>
</HEAD>
<BODY>
<form>
Input value:
<input type=”text” name=”test” length=”15″ onKeyPress=”return(currencyFormat(this,’,’,’.’,event))”>
</form>
</BODY>
</HTML>