nav ul li span{position:absolute; z-index:1; right:6px; top:2px; height:30px; display:block; width:30px; text-align:center; cursor:pointer; display:none; background:url(../images/plus-icon.png) no-repeat center center, rgba(0,0,0,0.2);}


@media only screen and (max-width:599px){
	
	
	nav ul li span   {display:block;}}