bom.js

function getElement (id) {
		if(document.getElementById) {
			return document.getElementById(id);
		} else if(document.all) {
			return document.all[id];
		} else {
			throw new Error("No way!")
		}
	}
	function isSortable(object) {
		return typeof object.sort == "function";
	}
	var obj = getElement("topFrame");
	console.log(obj)
	
	
	function getElementLeft(element) {
			var Left = element.offsetLeft,
				Top = element.offsetTop,
				current = element.offsetParent;
			while(current !== null) {
				Left += current.offsetLeft;
				Top += current.offsetTop;
				current = current.offsetParent;
			}
			return {
				l : Left,
				t :Top
			}
		}
	//utilEvent	
	var EventUtil = {
			addHandler : function (element,type,handler) {
				if(element.addEventListener) {
					element.addEventListener(type,handler,false);
				} else if (element.attachEvent) {
					element.attachEvent("on" + type,handler);
				} else {
					element["on" + type] = handler;
				}
			},
			getEvent : function (event) {
				return event ? event : window.event;
			},
			getTarget : function (event) {
				return event.target || event.scrElement;
			},
			preventDefault : function (event) {
				if(event.preventDefault) {
					event.preventDefault();
				} else {
					event.returnValue = false;
				}
			},
			stopPropagation : function (event) {
				if(event.stopPropagation) {
					event.stopPropagation();
				} else {
					event.cancelBubble = true;
				}
			},
			removeHandler : function (element,type,handler) {
				if(element.removeEventListener) {
					element.removeEventListener(type,handler,false);
				} else if (element.detachEvent) {
					element.detachEvent("on" + type,handler);
				} else {
					element["on" + type] = null;
				}
			}
		}
		
		var form1 = document.getElementById("form1");
		form1.onsubmit = function (event) {
			return false;
		}
		document.getElementById("txt").onkeydown = function(event) {
			if(event.ctrlKey && event.keyCode == 13) {
					console.log("提交内容");
		}
		}
			var mylist = document.getElementById("mylist");
		EventUtil.addHandler(mylist,"click",hand)
		function hand (event) {
			event = EventUtil.getEvent(event);
			var target = EventUtil.getTarget(event);
			if(target.tagName.toLowerCase() == "li") {
				console.log(1);
			};
		}
		EventUtil.removeHandler(mylist,"click",hand)