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javascript 处理事件绑定的一些兼容写法

　　本文标签：javascript,事件绑定

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:Rubys Louvre