function busca(n, d) {
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

// Declaring required variables
var digits = "0123456789";
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "().- ";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = phoneNumberDelimiters + "+";
// Minimum no of digits in an international phone no.
var minDigitsInIPhoneNumber = 10;

function isInteger(s)
{   var i;
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function trim(s)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not a whitespace, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (c != " ") returnString += c;
    }
    return returnString;
}

function stripCharsInBag(s, bag)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function checkInternationalPhone(strPhone){
  if((strPhone.charAt(0) == "1") && (strPhone.length != minDigitsInIPhoneNumber +1)) return false
  var bracket=3;
  strPhone=trim(strPhone);
  if(strPhone.indexOf("+")>1) return false;
  if(strPhone.indexOf("-")!=-1) bracket=bracket+1;
  if(strPhone.indexOf("(")!=-1 && strPhone.indexOf("(")>bracket) return false;
  var brchr=strPhone.indexOf("(");
  if(strPhone.indexOf("(")!=-1 && strPhone.charAt(brchr+2)!=")") return false;
  if(strPhone.indexOf("(")==-1 && strPhone.indexOf(")")!=-1) return false;
  s=stripCharsInBag(strPhone,validWorldPhoneChars);
  return ((isInteger(s)) && (s.length <= minDigitsInIPhoneNumber +1));
}

function validatePhoneNumber(incoming){
	var Phone=incoming;
	if((Phone==null)||(Phone=="")){
		return false;
	}
	if(checkInternationalPhone(Phone)==false){
		return false;
	}
	return true;
}

function envia_ctd(){
       if (busca('ctd_01_phone').value.length<1) {
                        window.alert("Phone field can not be empty");
                        busca('ctd_01_phone').focus();
			return ;
       }
       if (busca('ctd_01_phone').value.length<10) {
                        window.alert("Please enter a valid 10 digit Phone number");
                        busca('ctd_01_phone').focus();
                        return;
       }
       if (busca('ctd_01_phone').value.length>11) {
                        window.alert("Please enter a valid 10 digit Phone number");
                        busca('ctd_01_phone').focus();
                        return;
       }
	if(!validatePhoneNumber(busca('ctd_01_phone').value)){
		window.alert("Please enter a valid 10 digit Phone number");
		busca('ctd_01_phone').focus();	
		return;	
	} else {
		busca('ctd').submit();
	}
	return;
}