function GetCookie(name) {
	var arg=name+"=";
	var alen=arg.length;
	var clen=document.cookie.length;
	var i=0;
	while (i<clen) {
		var j=i+alen;
		if (document.cookie.substring(i,j)==arg)
		return "here";
		i=document.cookie.indexOf(" ",i)+1;
		if (i==0) break;
	}
	return null;
}
var visit=GetCookie("popup");

$(document).ready(function(){				   		   
	//When you click on a link with class of poplight and the href starts with a # 
		var popID = 'popup_name'; //Get Popup Name
		var popURL = '#?w=630'; //Get Popup href to define size
				
		//Pull Query & Variables from href URL
		var query= popURL.split('?');
		var dim= query[1].split('&');
		var popWidth = dim[0].split('=')[1]; //Gets the first query string value
		
		//Fade in the Popup and add close button
		$('#' + popID).fadeIn().css({ 'width': Number( popWidth ) }).prepend('<a href="#" class="close"><img src="http://www.techreview.net.au/popup/images/close_popup.png" class="btn_close" title="Close Window" alt="Close" /></a>');
		
		//Define margin for center alignment (vertical + horizontal) - we add 80 to the height/width to accomodate for the padding + border width defined in the css
		var popMargTop = ($('#' + popID).height() + 80) / 2;
		var popMargLeft = ($('#' + popID).width() + 80) / 2;
		
		//Apply Margin to Popup
		$('#' + popID).css({ 
			'margin-top' : -popMargTop,
			'margin-left' : -popMargLeft
		});
		
		//Fade in Background
		$('body').append('<div id="fade"></div>'); //Add the fade layer to bottom of the body tag.
		$('#fade').css({'filter' : 'alpha(opacity=80)'}).fadeIn(); //Fade in the fade layer 		
		
	//Close Popups and Fade Layer
	$('a.close').live('click', function() { //When clicking on the close or fade layer...
	  	$('#fade , .popup_block').fadeOut(function() {
			$('#fade, a.close').remove();  
	}); //fade them both out
		
		return false;
	});
});