在IECN看到心云寫的關于互換select的JS，因里面用到removeNode和swapNode等方法，導致在Firefox下無效。剛剛Google了下，發現可以通過自定義原型來修正只在IE下有效的屬性與方法。
原文參考：http://www.phpx.com/happy/top97619.html
修改方案如下：
<script language="javascript" type="text/javascript">
<!--
if(window.Event){// 修正Event的DOM
/*
IE5 MacIE5 Mozilla Konqueror2.2 Opera5
event yes yes yes yes yes
event.returnValue yes yes no no no
event.cancelBubble yes yes no no no
event.srcElement yes yes no no no
event.fromElement yes yes no no no
*/
Event.prototype.__defineSetter__("returnValue",function(b){//
if(!b)this.preventDefault();
return b;
});
Event.prototype.__defineSetter__("cancelBubble",function(b){// 設置或者檢索當前事件句柄的層次冒泡
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(){// 返回鼠標移出的源節點
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(){// 返回鼠標移入的源節點
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
/*
IE5 MacIE5 Mozilla Konqueror2.2 Opera5
document.documentElement yes yes yes yes no
document.activeElement yes null no no no
*/
}
if(window.Node){// 修正Node的DOM
/*
IE5 MacIE5 Mozilla Konqueror2.2 Opera5
Node.contains yes yes no no yes
Node.replaceNode yes no no no no
Node.removeNode yes no no no no
Node.children yes yes no no no
Node.hasChildNodes yes yes yes yes no
Node.childNodes yes yes yes yes no
Node.swapNode yes no no no no
Node.currentStyle yes yes no no no
*/
Node.prototype.replaceNode=function(Node){// 替換指定節點
this.parentNode.replaceChild(Node,this);
}
Node.prototype.removeNode=function(removeChildren){// 刪除指定節點
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){// 交換節點
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){// 是否包含某節點
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>
