// main javascript form validation
function checkForm()
{
	var radioArray // LOCAL
	frm=document.forms["contact_form"]; // GLOBAL
	error_msg="There are fields which need correction before sending";
	
	if(frm) {
		// check that the sender has entered valid info
		if (!valInputFields())
		{
			alert (error_msg);
			return false;
		}
			// the form is good
		return true;
	}
}

/**
 * DHTML phone number validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */

// 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 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){
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

function valPhone(){
	var Phone=frm.phone
	
	if ((Phone.value==null)||(Phone.value=="")){
		Phone.focus()
		return false
	}
	if (checkInternationalPhone(Phone.value)==false){
		Phone.value=""
		Phone.focus()
		return false
	}
	return true
 }

// Validate senders information
function valInputFields()
{
	if(frm.name.value!="" && valPhone())
	{
		return true;
	}
	return false;
}