1function formatSocialSecurity(val){
2 val = val.replace(/\D/g, '');
3 val = val.replace(/^(\d{3})/, '$1-');
4 val = val.replace(/-(\d{2})/, '-$1-');
5 val = val.replace(/(\d)-(\d{4}).*/, '$1-$2');
6 return val;
7}
8formatSocialSecurity("135711458");//"135-71-1458"