$.blockUI.defaults.overlayCSS.cursor = 'pointer';

$(document).ready(function() { 
	if (window.name!="gezien") {
		$('body').each(function() {		
			$.blockUI({ 
				message: "<img src='images/conference.png' /><input style='position: absolute; left: -2000px;' />", 
				css: { 
					top:  ($(window).height() - 480) /2 + 'px', 
					left: ($(window).width() - 640) /2 + 'px', 
					width: '640px',
					cursor: 'pointer'
				}
			});
			
			$('.blockUI')
				.each(function() {
					$(this)
						.click(function () {
									$.unblockUI();
								})
						.keydown(function () {
									$.unblockUI();
							})		
				}); 
		});
		
		window.name="gezien";
	}
});