让FF和IE离得更近
给FF添加了IE专有的属性和方法：
<script language="JavaScript" type="Text/JavaScript">
<!--
if(window.Event){// 修正Event的DOM
Event.prototype.__defineSetter__("returnValue",function(b){//
if(!b)this.preventDefault();
return b;
});
Event.prototype.__defineSetter__("cancelBubble",function(b){// 设置或者检索当前事件句柄的层次冒泡
if(b)this.stopPropagation();
return b;
});
Event.prototype.__defineGetter__("srcElement",function(){
var node=this.target;
while(node.nodeType!=1)node=node.parentNode;
return node;
});
Event.prototype.__defineGetter__("fromElement",function(){// 返回鼠标移出的源节点
var node;
if(this.type=="mouseover")
node=this.relatedTarget;
else if(this.type=="mouseout")
node=this.target;
if(!node)return;
while(node.nodeType!=1)node=node.parentNode;
return node;
});
Event.prototype.__defineGetter__("toElement",function(){// 返回鼠标移入的源节点
var node;
if(this.type=="mouseout")
node=this.relatedTarget;
else if(this.type=="mouseover")
node=this.target;
if(!node)return;
while(node.nodeType!=1)node=node.parentNode;
return node;
});
Event.prototype.__defineGetter__("offsetX",function(){
return this.layerX;
});
Event.prototype.__defineGetter__("offsetY",function(){
return this.layerY;
});
}
if(window.Document){// 修正Document的DOM
}
if(window.Node){// 修正Node的DOM
Node.prototype.replaceNode=function(Node){// 替换指定节点
this.parentNode.replaceChild(Node,this);
}
Node.prototype.removeNode=function(removeChildren){// 删除指定节点
if(removeChildren)
return this.parentNode.removeChild(this);
else{
var range=document.createRange();
range.selectNodeContents(this);
return this.parentNode.replaceChild(range.extractContents(),this);
}
}
Node.prototype.swapNode=function(Node){// 交换节点
var nextSibling=this.nextSibling;
var parentNode=this.parentNode;
node.parentNode.replaceChild(this,Node);
parentNode.insertBefore(node,nextSibling);
}
}
if(window.HTMLElement){
HTMLElement.prototype.__defineGetter__("all",function(){
var a=this.getElementsByTagName("*");
var node=this;
a.tags=function(sTagName){
return node.getElementsByTagName(sTagName);
}
return a;
});
HTMLElement.prototype.__defineGetter__("parentElement",function(){
if(this.parentNode==this.ownerDocument)return null;
return this.parentNode;
});
HTMLElement.prototype.__defineGetter__("children",function(){
var tmp=[];
var j=0;
var n;
for(var i=0;i<this.childNodes.length;i++){
n=this.childNodes[i];
if(n.nodeType==1){
tmp[j++]=n;
if(n.name){
if(!tmp[n.name])
tmp[n.name]=[];
tmp[n.name][tmp[n.name].length]=n;
}
if(n.id)
tmp[n.id]=n;
}
}
return tmp;
});
HTMLElement.prototype.__defineGetter__("currentStyle", function(){
return this.ownerDocument.defaultView.getComputedStyle(this,null);
});
HTMLElement.prototype.__defineSetter__("outerHTML",function(sHTML){
var r=this.ownerDocument.createRange();
r.setStartBefore(this);
var df=r.createContextualFragment(sHTML);
this.parentNode.replaceChild(df,this);
return sHTML;
});
HTMLElement.prototype.__defineGetter__("outerHTML",function(){
var attr;
var attrs=this.attributes;
var str="<"+this.tagName;
for(var i=0;i<attrs.length;i++){
attr=attrs[i];
if(attr.specified)
str+=" "+attr.name+"=""+attr.value+""";
}
if(!this.canHaveChildren)
return str+">";
return str+">"+this.innerHTML+"</"+this.tagName+">";
});
HTMLElement.prototype.__defineGetter__("canHaveChildren",function(){
switch(this.tagName.toLowerCase()){
case "area":
case "base":
case "basefont":
case "col":
case "frame":
case "hr":
case "img":
case "br":
case "input":
case "isindex":
case "link":
case "meta":
case "param":
return false;
}
return true;
});
HTMLElement.prototype.__defineSetter__("innerText",function(sText){
var parsedText=document.createTextNode(sText);
this.innerHTML=parsedText;
return parsedText;
});
HTMLElement.prototype.__defineGetter__("innerText",function(){
var r=this.ownerDocument.createRange();
r.selectNodeContents(this);
return r.toString();
});
HTMLElement.prototype.__defineSetter__("outerText",function(sText){
var parsedText=document.createTextNode(sText);
this.outerHTML=parsedText;
return parsedText;
});
HTMLElement.prototype.__defineGetter__("outerText",function(){
var r=this.ownerDocument.createRange();
r.selectNodeContents(this);
return r.toString();
});
HTMLElement.prototype.attachEvent=function(sType,fHandler){
var shortTypeName=sType.replace(/on/,"");
fHandler._ieEmuEventHandler=function(e){
window.event=e;
return fHandler();
}
this.addEventListener(shortTypeName,fHandler._ieEmuEventHandler,false);
}
HTMLElement.prototype.detachEvent=function(sType,fHandler){
var shortTypeName=sType.replace(/on/,"");
if(typeof(fHandler._ieEmuEventHandler)=="function")
this.removeEventListener(shortTypeName,fHandler._ieEmuEventHandler,false);
else
this.removeEventListener(shortTypeName,fHandler,true);
}
HTMLElement.prototype.contains=function(Node){// 是否包含某节点
do if(Node==this)return true;
while(Node=Node.parentNode);
return false;
}
HTMLElement.prototype.insertAdjacentElement=function(where,parsedNode){
switch(where){
case "beforeBegin":
this.parentNode.insertBefore(parsedNode,this);
break;
case "afterBegin":
this.insertBefore(parsedNode,this.firstChild);
break;
case "beforeEnd":
this.appendChild(parsedNode);
break;
case "afterEnd":
if(this.nextSibling)
this.parentNode.insertBefore(parsedNode,this.nextSibling);
else
this.parentNode.appendChild(parsedNode);
break;
}
}
HTMLElement.prototype.insertAdjacentHTML=function(where,htmlStr){
var r=this.ownerDocument.createRange();
r.setStartBefore(this);
var parsedHTML=r.createContextualFragment(htmlStr);
this.insertAdjacentElement(where,parsedHTML);
}
HTMLElement.prototype.insertAdjacentText=function(where,txtStr){
var parsedText=document.createTextNode(txtStr);
this.insertAdjacentElement(where,parsedText);
}
HTMLElement.prototype.attachEvent=function(sType,fHandler){
var shortTypeName=sType.replace(/on/,"");
fHandler._ieEmuEventHandler=function(e){
window.event=e;
return fHandler();
}
this.addEventListener(shortTypeName,fHandler._ieEmuEventHandler,false);
}
HTMLElement.prototype.detachEvent=function(sType,fHandler){
var shortTypeName=sType.replace(/on/,"");
if(typeof(fHandler._ieEmuEventHandler)=="function")
this.removeEventListener(shortTypeName,fHandler._ieEmuEventHandler,false);
else
this.removeEventListener(shortTypeName,fHandler,true);
}
}
//-->
</script>
举个例子，在FF中使用currentStyle
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="cn" lang="cn">
<head>
<style type="text/css">
#a{width:100px;height:100px;background-color:yellow;}
</style>
<script type="text/javascript">
window.onload=function(){
HTMLElement.prototype.__defineGetter__("currentStyle", function(){return this.ownerDocument.defaultView.getComputedStyle(this,null);});
//上面一行代码就给所有的HTML元素添加了currentStyle属性
var a=document.getElementById("a");
alert("style中的width=\""+a.style.width+"\"\tcurrentStyle中的width=\""+a.currentStyle.width+"\"");
}
</script>
</head><body>
<div id="a"></div>
</body>
</html>