$(document).ready(function() {	

	if( $.cookie('Popup'))
	{
	}
	else
	{
		
		var id = '#dialog';
	
		//Get the screen height and width
		var maskHeight = $(document).height();
		var maskWidth = $(window).width();
	
		//Set heigth and width to mask to fill up the whole screen
		$('#mask').css({'width':maskWidth,'height':maskHeight});
		
		//transition effect		
		$('#mask').fadeIn(1);	
		$('#mask').fadeTo("fast",0.9);	
	
		//Get the window height and width
		var winH = $(window).height();
		var winW = $(window).width();
              
		//Set the popup window to center
		$(id).css('top',  winH/2-$(id).height()/2);
		$(id).css('left', winW/2-$(id).width()/2);
	
		//transition effect
		$(id).fadeIn(1); 	
	
		//if close button is clicked
		$('.window .close').click(function (e) {
			//Cancel the link behavior
			e.preventDefault();
			
			$('#mask').hide();
			$('.window').hide();
		});		
		
		//if mask is clicked
		$('#mask').click(function () {
			$(this).hide();
			$('.window').hide();
		});
		$.cookie('Popup', 'true', { expires: 31 });
		
	}
	
});