Scriptlet: Format Phone Value

Convert phone number value on form to xxx-xxx-xxxx format.

//returns xxx-xxx-xxxx format

function ConvertPhone(phone) {       

var formatted = phone.replace(/[^0-9]+/g, '');   

if (formatted.length == 10){

formatted = formatted.replace(^[2-9]\d{2}-\d{3}-\d{4}$, '$1-$2-$3'); 
} 

else {

formatted = respondent.phone;
}

return formatted; 

}