$(document).ready(function(){
		//hover(mousein behaviour,mouseout behaviour)
		$("span.extra").mouseenter(function()
		{
			$(this).css("z-index","88");
			$(this).prev("span").show();
		});
		
		$("span.extra").mouseleave(function()
		{
			$(this).css("z-index","70");
			if($.browser.msie) {
				$(this).prev("span").css("display","none");
			}else{
				$(this).prev("span").fadeOut(1000);
			}
		});
    });