var isNN = (navigator.appName.indexOf("Netscape")!=-1);
function autoTab(input,len, e) {
var keyCode = (isNN) ? e.which : e.keyCode; 
var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
if(input.value.length >= len && !containsElement(filter,keyCode)) {
input.value = input.value.slice(0, len);
input.form[(getIndex(input)+1) % input.form.length].focus();
}

function containsElement(arr, ele) {
	var found = false, index = 0;
	while(!found && index < arr.length)
		if(arr[index] == ele)
			found = true;
		else
			index++;
		return found;
}
	
function getIndex(input) {
	var index = -1, i = 0, found = false;
	while (i < input.form.length && index == -1)
		if (input.form[i] == input)index = i;
		else i++;
		return index;
}
return true;
}

function validEmail(myform,fieldLabel,required)
{
	var result = true;
	
	if (required && !validRequired(myform,fieldLabel))
		result = false;

	if (result && ((myform.value.length < 3) || !isEmailAddr(myform.value)) )
	{
		alert("Please enter a complete email address in the form: yourname@yourdomain.com");
		myform.focus();
		result = false;
	}
   
  return result;

}
function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function validRequired(myform,fieldLabel)
{
	var result = true;
	
	if (myform.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		myform.focus();
		result = false;
	}
	
	return result;
}

function allDigits(str)
{
	return inValidCharSet(str,"0123456789");
}

function inValidCharSet(str,charset)
{
	var result = true;
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)
		{
			result = false;
			break;
		}
	
	return result;
}

function validateForm(myform)
{	
	if (!validRequired(myform.name,"Your Name"))
		return false;
	if (!validRequired(myform.emailaddy,"Email Address"))
		return false;
	if (!validEmail(myform.emailaddy,"Email Address",true))
		return false;	        
	if (!validRequired(myform.phone,"Phone Number"))
		return false;							
}