Currency Input

Hi

I have this input tag where you put the total of your receipt :

<input type="text" name="currency" id="currency" class="text-input" onBlur="this.value=formatCurrency(this.value);"   />

This is my javascript:

<script type="text/javascript">
<!-- Begin
function formatCurrency(num) {
num = num.toString().replace(/\$|\,/g,'');
if(isNaN(num))
num = "0";
sign = (num == (num = Math.abs(num)));
num = Math.floor(num*100+0.50000000001);
cents = num%100;
num = Math.floor(num/100).toString();
if(cents<10)
cents = "0" + cents;
for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
num = num.substring(0,num.length-(4*i+3))+','+
num.substring(num.length-(4*i+3));
return (((sign)?'':'-') + '$' + num + '.' + cents);
}
//  End -->
</script>

Users can only enter receipt more than $10.00 bucks, how can I set that on my script?

:geek: