$(document).ready(function() {
		$("#newsletterEmail").keydown(function(){
		    if($(this).val() == "Twój e-mail")
			$(this).val("");
		});
		
		$("#newsletterEmail").click(function(){
		    if($(this).val() == "Twój e-mail")
			$(this).val("");
		});
		
		$("#newsletterEmail").keyup(function(){
		
			var email = $("#newsletterEmail").val();
					
			if(email != 0)
			{
				if(isValidEmailAddress(email))
				{
					$("#validEmail").css({
						"background-image": "url('/site_media/validYes.png')"
					});
				} else {
					$("#validEmail").css({
						"background-image": "url('/site_media/validNo.png')"
					});
				}
			} else {
				$("#validEmail").css({
					"background-image": "none"
				});			
			}
		
		});
	$("#newsletterForm").submit(function(){
	    if(!isValidEmailAddress($("#newsletterEmail").val()))
		return false;
	    return true;
	});
	
	});
	
	function isValidEmailAddress(emailAddress) {
 		var pattern = new RegExp(/^(("[\w-\s]+")|([\w-]+(?:\.[\w-]+)*)|("[\w-\s]+")([\w-]+(?:\.[\w-]+)*))(@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$)|(@\[?((25[0-5]\.|2[0-4][0-9]\.|1[0-9]{2}\.|[0-9]{1,2}\.))((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\.){2}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\]?$)/i);
 		return pattern.test(emailAddress);
	}