The tap event on an element.

Tapper

  	window.onload = function(){
			var startPosX=0,startPosY=0;
			var elements = $("tapHighlightJS");
			for(var i=0;i<elements.length;i++){
				var el = $(elements[i]);
			el.bind('touchstart', function(ev){
  				var touchobj = ev.originalEvent.changedTouches[0];
  				startPosX = touchobj.pageX;
  				startPosY = touchobj.pageY;
 			}).bind('touchend', function(ev){
  				var touchobj = ev.originalEvent.changedTouches[0];
  				if(Math.abs(touchobj.pageX-startPosX)<5 ? (Math.abs(touchobj.pageY-startPosY)<5?true:false):false){
  					var tapEl = $(ev.originalEvent.target);
  					tapEl.css("opacity","0.3");
  					setTimeout(function(){
						tapEl.css("opacity","1");
  					},2000);
  				}
 			});
		}
		};