// TO use this method for any text input boxes:
//Phone Number: <input type="text"
//               size="15" name="phone" id="phone"
//               onkeypress="return formatPhone(this, event)"
//               onkeyup="formatPhone(this)"
//               onchange="formatPhone(this)">

// ---------------------------------------------------------
// Phone number formatter, created for Foodry
// For more info, visit:
// http://www.foodry.com/blog
// ---------------------------------------------------------
function formatPhone(elm, e) {
    var keychar;

    // If used in onkeypress, pass in the event and this will
    // grab the character and do the right thing. This allows
    // for a smoother user experience than if the chars are
    // being visibly deleted.
    if (e) {
        var keynum;
        if (window.event) {
            keynum = e.keyCode
        }
        else if (e.which) {
            keynum = e.which
        }

        keychar = String.fromCharCode(keynum)
    }

    // Allow a backspace to go through, so the user
    // can correct any typos.
    if (/[\b]/.exec(keychar)) {
        return true;
    } else {
        var p = elm.value + keychar;

        // Don't allow a leading 1 or 0. We also strip out all
        // non-numeric characters here to make the formatting
        // easier later on. This could be modified to allow
        // letters if you consider them valid.
        var temp = p;
        p = p.replace(/^[01]/,"");
        p = p.replace(/\D+/g, "");
        if(temp != p && temp.length < 2){
          alert("NOTE:  Phone numbers must be entered in the following format:\n\n                                      (800) 555-1212\n\nPlease be careful to enter ONLY the area code and phone number.");
        }

        // You can easily change the formatting of the phone
        // number by editing the conditionals below.
        if (p.length > 0 && p.length < 3) {
            p = "("+p;
        }
        else if (p.length >= 3 && p.length < 7) {
            p = "("+p.substring(0,3)+") "+p.substring(3);
        }
        else if (p.length >= 7 && p.length < 10) {
            p = "("+p.substring(0,3)+") "+p.substring(3,6)+"-"+p.substring(6);
        }
        else if (p.length) {
            p = "("+p.substring(0,3)+") "+p.substring(3,6)+"-"+p.substring(6,10);
        }
        elm.value = p;

        return false;
    }
}