var	count = 0;
var images = new Array('ftpImages/ftp1.jpg', 'ftpImages/ftp2.jpg','ftpImages/ftp3.jpg',
			'ftpImages/ftp4.jpg','ftpImages/ftp5.jpg');

function returnNext(){
	var var1 = document.getElementById("image");
	if(count<4)
		count = count+1;
	else
		count = 0;
	var1.src = images[count];
}
	
function returnPrev(){
	var var1 = document.getElementById("image");
	if(count > 0)
		count = count-1;
	else
		count = 4;
	var1.src = images[count];
}
	
function first(){
	var var1 = document.getElementById("image");
	count = 0;
	var1.src = images[count];
}
	
function last(){
	var var1 = document.getElementById("image");
	count = 4;
	var1.src = images[count];
}

function checkIfEmpty(form){
	if(form.login.value.length == 0){
		alert("Please enter your user name.");
		form.login.focus();
		return false;
		}
		
	if(form.password.value.length == 0){
		alert("Please enter your password.");
		form.password.focus();
		return false;
	}
	return true;
}

function checkRegistration(form){
	
	for (var i=0; i < form.RadioButton.length; i++){
		if (form.RadioButton[i].checked){
			var rad_val = form.RadioButton[i].value;
			if(rad_val == "no"){
				alert("You must accept the license agreement.");
				return false;
			}
		}
	}
	
	if(form.fname.value.length == 0){
		alert("Please enter your first name.");
		form.fname.focus();
		return false;
	}
	else{
		if(form.lname.value.length == 0){
			alert("Please enter your last name.");
			form.lname.focus();
			return false;
		}
		else{
			if(form.email.value.length == 0){
				alert("Please enter your email.");
				form.email.focus();
				return false;
			}
			else{
				return true;
			}
		}
	}
	return false;
}