// JavaScript Document

function init(){
	var imgs = $$('div#header img');
	if (imgs.length > 1){
		imgs.each(function(img,i){
			if(i > 0){
				img.inject(img.parentNode, 'top');
			}
		});
		setInterval("nextHeader()", 5000);
	}
}

function nextHeader(){
	var img = $$('div#header img:last-child')[0]
	var fx = new Fx.Tween(img, {duration: 1000});
	fx.start('opacity', 0).chain(function(){
		img.inject(img.parentNode, 'top');
		fx.set('opacity', 1);
	});
}

function checkform(form){
	
	var chk = [
			[form.firstname, 'First Name is required'],
			[form.lastname, 'Last Name is required'],
			[form.email, 'Valid E-Mail is required'],
			[form.company, 'Company Name is required'],
			[form.comments, 'Comments are required']
		];
	
	for (var i=0; i<chk.length; i++){
		if ( (chk[i][0]).value == ''){
			checkform_error(chk[i][1], chk[i][0]);
			return false;
			break;
		}
	}
	
	return true;
}

function checkform_error(error, field){
	field.focus();
	alert(error);
}
/*
window.onload = function(){
	var header = document.getElementById('header');
	var imgs = header.getElementsByTagName('img');
	
	if (imgs.length > 1){
		header.className += ' js';
		setInterval("rotateHeader();", 2000);
	}
}

function rotateHeader(){
	
}

function alphaTo(obj, value, duration){
	obj.style.
}*/
window.addEvent('load', init);