Validate Currency Format

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Validate Dates

Validate Currency Format

Home :: Javascript :: Validate Currency

Javascript can be used to automatically format numbers to currency (rounded off to 2 decimal places).

Here is a javascript function to ensure user input from form fields on your web pages. Attach it to the onKeyPress event of a form field.

Type some numbers and see them formatted

Copy and paste the javascript code in the text box below into a script block on your web page

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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;key = String.fromCharCode(whichCode);if (strCheck.indexOf(key) == -1) return false;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;}

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