// 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);
}



/*Contact form validation*/
function checkData() {

if (document.myform.name.value == "") {
alert("Please enter your \"name\" in the text field!\nAll fields are required!");
document.myform.name.focus();
return false;}

if (document.myform.email.value == "") {
alert("Please enter your \"email address\"\nAll fields are required!");
document.myform.email.focus();
return false;}

if (document.myform.email.value.indexOf("@")==-1 || document.myform.email.value.indexOf(".")==-1 || document.myform.email.value.indexOf(" ")!=-1 || document.myform.email.value.length<6) {
alert("Sorry, your \"email address\" appears to be is invalid.\nplease re-enter a valid email address!");
document.myform.email.focus();
return false;}

if (document.myform.phone.value == "") {
alert("Please enter your \"phone number\"!\nAll fields are required!!");
document.myform.phone.focus();
return false;}

	var phone=document.myform.phone
	
	if ((phone.value==null)||(phone.value=="")){
		alert("Please Enter your Phone Number")
		phone.focus()
		return false
	}
	if (checkInternationalPhone(phone.value)==false){
		alert("Please Enter a Valid Phone Number")
		phone.value=""
		phone.focus()
		return false
	}
	//return true

if (document.myform.comments.value == "") {
alert("Please provide some \"comments\" in the textarea!");
document.myform.comments.focus();
return false;}

}