function loginPopup() {
	var popID = "login_popup";

	$('#' + popID).fadeIn().prepend('<a href="#" class="close"><span class="btn_close" title="Close Window">X</span></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>');
	$('#fade').css({'filter' : 'alpha(opacity=70)'}).fadeIn();
	
	return false;
}

$(document).ready(function(){
	//Close Popups and Fade Layer
	$('a.close, #fade').live('click', function() {
		$('#fade , .popup_block').fadeOut(function() {
			$('#fade, a.close').remove();  
	}); 
		
		return false;
	});

	$("#options").click(function () {
		if($("#options").text() == "Advanced options [+]")
		{
			$("div.advanced").slideDown(400);
			$("#options").text("Advanced options [-]");
		}
		else
		{
			$("div.advanced").slideUp(400);
			$("#options").text("Advanced options [+]");
		}
	});

});