function isEmail(email_str) 
{
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	var validChars="\[^\\s" + specialChars + "\]";
	var quotedUser="(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var atom=validChars + '+';
	var word="(" + atom + "|" + quotedUser + ")";
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	var matchArray=email_str.match(emailPat);
	if (matchArray==null) return false;
	var user=matchArray[1];
	var domain=matchArray[2];
	for (i=0; i<user.length; i++)	if (user.charCodeAt(i)>127) 	return false;
	for (i=0; i<domain.length; i++)	if (domain.charCodeAt(i)>127)	return false;
	if (user.match(userPat)==null) 	return false;
	var IPArray=domain.match(ipDomainPat);

	if (IPArray!=null) 
	{
		for (var i=1;i<=4;i++)
			if (IPArray[i]>255) return false;
		return true;
	}

	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;

	for (i=0;i<len;i++) if (domArr[i].search(atomPat)==-1) return false;
	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) return false;
	if (len<2) return false;

	return true;
} 

$(document).ready(function(){
	$("#subscribe").submit(function(){
		if (!isEmail($("#email").attr('value'))) {
			alert(ENTER_EMAIL);
			$("#email").focus();
			return false;
		}        
		return true;
	});
	$("#email").blur(function(){
		if (this.value == "") this.value = YOUR_EMAIL;
	});
	$("#email").focus(function(){
		if (this.value == YOUR_EMAIL) this.value="";
	});
	$("#a-subscribe").click(function(){
	   $("#subscribe").submit();
	   return false; 
	});
	$("#a-unsubscribe").click(function(){
	   $("#operation").attr('value', 'unsubscribe');
	   $("#subscribe").submit();
	   return false; 
	});
	if ($("body.sub #secondary-column").height() > $("body.sub #main-column").height()) $("body.sub #main-column").height($("body.sub #secondary-column").height());
	$("body.sub #sidebar").height($("body.sub #main-column").height() + 92);
	$("#nav > li > ul").wrap("<div></div>");
	$("#nav div").hide();
	if ($("#nav li a").is('.active')) $("#nav").find('.active').parent().parent().parent().show();
	if ($("#nav li li a").is('.active')) $("#nav").find('.active').parent().parent().parent().parent().parent().show();
	$("#nav div").prev().addClass("accordion");
	$("#nav a.accordion").bind("click", function(event){
		event.preventDefault();
		if ($(this).next().is("div:hidden")) $(this).next().slideDown("normal");
		if ($(this).parent().siblings().children("a.accordion").next().is("div:visible")) $(this).parent().siblings().children("a.accordion").next().slideUp("normal");
	});
});

$(window).resize(function(){
	if ($("body.sub #secondary-column").height() > $("body.sub #main-column").height()) $("body.sub #main-column").height($("body.sub #secondary-column").height());
	$("body.sub #sidebar").height($("body.sub #main-column").height() + 92);
});