货币输入框，自动分位数字_表单按钮特效

一个自动分位货币输入框，用作输入人民币最合适了，测试时候注意只能输入数字，会以三个数字为单位自动分开，并添加一个逗号分隔符，让读者一目了然。

<html>
<head>
<title>一个自动分位货币输入框</title>
<script>
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
key = String.fromCharCode(whichCode); 
if (strCheck.indexOf(key) == -1) return false;  // Not a valid 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>
Enter Value:  
<input type=text name=test length=15 onKeyPress="return(currencyFormat(this,',','.',event))">
</form>
<body>
</html>

所属频道：表单按钮特效/更新时间：2013-01-06

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