function validate_form() {
	error=""
	if(document.forms[0].name.value == ""){
		error= error + "A name is required. "
	}
	validRegExp = /^[^@]+@[^@]+.[a-z]{2,}$/i;
	strEmail = document.forms[0].email.value;
	if (strEmail.search(validRegExp) == -1) {
		error= error + "A valid e-mail address is required.";
	}
	if (error != ""){
		alert(error);
		return false;
	} else {
		document.forms["mailing-list"].submit();	
		return true;
	}
}


function imageClickChange(image_src){
	jQuery("#im").attr("src",image_src);
}

function imageHoverChange(image_src){
	var previous_image = jQuery("im").attr("src");
	$('img.swap').hover(function () {
		jQuery("#im").attr("src",image_src);	
	}, function () {
		jQuery("#im").attr("src",previous_image);	
	});
}