$(document).ready(function(){

	
		$(".thumbitem").click(function(){
			var largePath = $(this).attr("href");
			var largeAlt = $(this).attr("title");
			if($(this).children("img").hasClass("activeone")){
				return false;
			}
			else{
				$(".activeone").removeClass("activeone");
				$(this).children("img").addClass("activeone");	
				$("#mainimage").attr({ src: largePath, alt: largeAlt });
			
			}return false;
		});
});