var showStyle = {
		preview : Object,
		
		init : function() {
			this.preview = $('tnPreviewWindow');
			document.getElementsByClassName('siteStyleTn').each(function(ele){
				Event.observe(ele, 'click', this.showTnPreview, false);
			});
		},
		
		showTnPreview : function(e) {
			console.log(this.preview);
		}
	}