Stupid Form Tricks - Formatting Phone Numbers With Javascript

for most browsers

This script will put a phone number into this format - (xxx)xxx-xxxx

It also contains the code for this format - xxx-xxx-xxxx
You can easily switch formats by commenting out and uncommenting the marked areas of the script.

The script can format any number of phone number fields. You just need to name each field as an item in the nums array.

<form>
Home <input type="text" name="phone1" value=""><br>
Work <input type="text" name="phone2" value=""><br>
<input type="button" onclick="doThis()" value="format numbers">
</form>
<script language="javascript">

var nums=new Array('document.forms[0].phone1', 'document.forms[0].phone2');

function doThis(){

var re= /\D/;
// test for this format: (xxx)xxx-xxxx
var re2 = /^\({1}\d{3}\)\d{3}-\d{4}/; 
// test for this format: xxx-xxx-xxxx
//var re2 = /^\d{3}-\d{3}-\d{4}/;

for (i=0; i<nums.length;i++){
var num=eval(nums[i]+'.value');

var newNum;
 if (num != "" && re2.test(num)!=true){
   if (num != ""){
     while (re.test(num)){
     num = num.replace(re,"");
     }
   }

  if (num.length != 10){
    alert('Please enter a 10 digit phone number');
    eval(nums[i]).select();
    break;
    }
   else {
     // for format (xxx)xxx-xxxx
     newNum = '(' + num.substring(0,3) + ')' + num.substring(3,6) + '-' + num.substring(6,10);
     // for format xxx-xxx-xxxx
     // newNum = num.substring(0,3) + '-' + num.substring(3,6) + '-' + num.substring(6,10);
     eval(nums[i]).value=newNum;
     }
   }
  }
}
   
</script>

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PXL8 2003