function leadingZeros(num, totalChars, padWith) { num = num + ""; padWith = (padWith) ? padWith : "0"; if (num.length < totalChars) { while (num.length < totalChars) { num = padWith + num; } } else {} if (num.length > totalChars) { //if padWith was a multiple character string and num was overpadded num = num.substring((num.length - totalChars), totalChars); } else {} return num; }