Convert the amount entered in the textbox to US format

Script used to convert the entered textbox value to US format is as follows

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

This is what you have to do for Textbox

<asp:TextBox ID="TextBox1" runat="server" Style="left: 411px; position: absolute; top: 186px" onBlur="this.value=formatCurrency(this.value);"></asp:TextBox>