example post signup share js/ui...simple and easy. from tap

share.js

$(function () {
	var clicks = 0;
	var twitClick = 0 , fbCLick = 0, playClick = 0;
	function changeWidth() {

		var percent = Math.min(Math.round(clicks / 3 * 100), 100);
		var progress = $('#share-progress');
		progress.width(percent + '%');
		progress.find('.percent').html(percent+'%')
	}


	$('#fbshare').on('click', function () {
		var w = 580, h = 300,
			left = (screen.width / 2) - (w / 2),
			top = (screen.height / 2) - (h / 2);
		if(!twitClick )
		{
			twitClick = 1;
			clicks++;
			changeWidth();
		}
		var msg = "I want to TAP you! TAP is a new, super simple messaging app. I just reserved my username, check it out and reserve your username too before only the silly ones left!";
		if ((screen.width < 480) || (screen.height < 480)) {
			window.open('http://www.facebook.com/share.php?u=http://bit.ly/reserve-tap', '', 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width=' + w + ', height=' + h + ', top=' + top + ', left=' + left);
		} else {
			window.open('http://www.facebook.com/share.php?u=http://bit.ly/reserve-tap', '', 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width=' + w + ', height=' + h + ', top=' + top + ', left=' + left);
		}
	});

	$('#twittershare').on('click', function () {
		var loc = encodeURIComponent('http://bit.ly/reserve-tap'),
			title = "I want to TAP you ! Just reserved my username for TAP, reserve yours before only the silly ones are left !",
			w = 580, h = 300,
			left = (screen.width / 2) - (w / 2),
			top = (screen.height / 2) - (h / 2);
		if(!fbCLick )
		{
			fbCLick = 1;
			clicks++;
			changeWidth();
		}
		window.open('http://twitter.com/share?text=' + title + '&url=' + loc, '', 'height=' + h + ', width=' + w + ', top=' + top + ', left=' + left + ', toolbar=0, location=0, menubar=0, directories=0, scrollbars=0');
	});

	$('.play').on('click', function () {
		if(!playClick )
		{
			playClick = 1;
			clicks++;
			changeWidth();
		}
		var url= "http://bit.ly/tap-demo";
		window.open(url,'_blank');
	});

});