Working in Nic Edit Mask

Working in Nic Edit Mask function mask(str,textbox,loc,delim){var locs = loc.split(',');
for (var i = 0; i <= locs.length; i++){for (var k = 0; k <= str.length; k++){if (k == locs[i]){if (str.substring(k, k+1) != delim){str = str.substring(0,k) + delim + str.substring(k,str.length)}}}}textbox.value = str}