javascript 处理事件绑定的一些兼容写法

绑定事件
复制代码 代码如下:
var addEvent = function( obj, type, fn ) {
if (obj.addEventListener)
obj.addEventListener( type, fn, false );
else if (obj.attachEvent) {
obj["e"+type+fn] = fn;
obj.attachEvent( "on"+type, function() {
obj["e"+type+fn]();
} );
}
};

另一个实现
复制代码 代码如下:
var addEvent = (function () {
if (document.addEventListener) {
return function (el, type, fn) {
el.addEventListener(type, fn, false);
};
} else {
return function (el, type, fn) {
el.attachEvent('on' + type, function () {
return fn.call(el, window.event);
});
}
}
})();

绑定onpropertychange事件

onpropertychange是微软制造的一个事件，它在一个元素的属性发生变化的时候触发，常见的有文本的长度改变，样长改变等，FF大致和它相似的属性为oninput事件，不过它只针对textfield与textarea的value属性。safari，firefox，chrome与 opera都支持此属性。
复制代码 代码如下:
var addPropertyChangeEvent = function (obj,fn) {
if(window.ActiveXObject){
obj.onpropertychange = fn;
}else{
obj.addEventListener("input",fn,false);
}
}

移除事件
复制代码 代码如下:
var removeEvent = function( obj, type, fn ) {
if (obj.removeEventListener)
obj.removeEventListener( type, fn, false );
else if (obj.detachEvent) {
obj.detachEvent( "on"+type, obj["e"+type+fn] );
obj["e"+type+fn] = null;
}
};

加载事件
复制代码 代码如下:
var loadEvent = function(fn) {
var oldonload = window.onload;
if (typeof window.onload != 'function') {
window.onload = fn;
}else {
window.onload = function() {
oldonload();
fn();
}
}
}

阻止事件
复制代码 代码如下:
var stopEvent = function(e){
e = e || window.event;
if(e.preventDefault) {
e.preventDefault();
e.stopPropagation();
}else{
e.returnValue = false;
e.cancelBubble = true;
}
}

如果仅仅是阻止事件冒泡
复制代码 代码如下:
var stopPropagation = function(e) {
e = e || window.event;
if (!+"\v1") {
e.cancelBubble = true;
} else {
e.stopPropagation();
}
}

取得事件源对象

相当于Prototype.js框架的Event.element(e)
复制代码 代码如下:
var getEvent = function(e){
e = e || window.event;
var target = event.srcElement ? event.srcElement : event.target;
return target
}

或者这个功能更强大，我在开发datagrid时开发出来的，详细用法见《一步步教你实现表格排序（第二部分）》。
复制代码 代码如下:
var getEvent = function(e) {
var e = e || window.event;
if (!e) {
var c = this.getEvent.caller;
while (c) {
e = c.arguments[0];
if (e && (Event == e.constructor || MouseEvent == e.constructor)) {
break;
}
c = c.caller;
}
}
var target = e.srcElement ? e.srcElement : e.target,
currentN = target.nodeName.toLowerCase(),
parentN = target.parentNode.nodeName.toLowerCase(),
grandN = target.parentNode.parentNode.nodeName.toLowerCase();
return [e,target,currentN,parentN,grandN];
}

最后附上DOM3.0事件的一览表
type Bubbling phase Cancelable Target node types DOM interface DOMActivate Yes Yes Element UIEvent DOMFocusIn Yes No Element UIEvent DOMFocusOut Yes No Element UIEvent focus No No Element UIEvent blur No No Element UIEvent textInput Yes Yes Element TextEvent click Yes Yes Element MouseEvent dblclick Yes Yes Element MouseEvent mousedown Yes Yes Element MouseEvent mouseup Yes Yes Element MouseEvent mouseover Yes Yes Element MouseEvent mousemove Yes Yes Element MouseEvent mouseout Yes Yes Element MouseEvent keydown Yes Yes Element KeyboardEvent keyup Yes Yes Element KeyboardEvent mousemultiwheel Yes Yes Document, Element MouseMultiWheelEvent mousewheel Yes Yes Document, Element MouseWheelEvent DOMSubtreeModified Yes No Document, DocumentFragment, Element, Attr MutationEvent DOMNodeInserted Yes No Element, Attr, Text, Comment, CDATASection, DocumentType, EntityReference, ProcessingInstruction MutationEvent DOMNodeRemoved Yes No Element, Attr, Text, Comment, CDATASection, DocumentType, EntityReference, ProcessingInstruction MutationEvent DOMNodeRemovedFromDocument No No Element, Attr, Text, Comment, CDATASection, DocumentType, EntityReference, ProcessingInstruction MutationEvent DOMNodeInsertedIntoDocument No No Element, Attr, Text, Comment, CDATASection, DocumentType, EntityReference, ProcessingInstruction MutationEvent DOMAttrModified Yes No Element MutationEvent DOMCharacterDataModified Yes No Text, Comment, CDATASection, ProcessingInstruction MutationEvent DOMElementNameChanged Yes No Element MutationNameEvent DOMAttributeNameChanged Yes No Element MutationNameEvent load No No Document, Element Event unload No No Document, Element Event abort Yes No Element Event error Yes No Element Event select Yes No Element Event change Yes No Element Event submit Yes Yes Element Event reset Yes Yes Element Event resize Yes No Document, Element UIEvent scroll Yes No Document, Element UIEvent作者:Ruby's Louvre