window.onload = function(){alert(2)}

	function addEvent (fun) {

		var old = window.onload;

		if(typeof old != "function"){

			window.onload = fun;

		}else{

			window.onload = function(){

				old();

				fun();

			}

		}

	}

	function delegationforli(){

		var oul = document.getElementsByTagName('ul')[0];

		console.log(oul)

		oul.addEventListener('click',function(e){

			console.log(e.target);

			if(e.target && e.target.nodeName.toLowerCase() == 'li'){

				alert(e.target.innerHTML);

			}

		})

	}

	addEvent(delegationforli);