原型扩展的方法解决IE和Firefox的Js兼容问题
if(!document.all){
//textContent->text
Element.prototype.__defineGetter__('text',function(){return this.textContent===undefined?this.text:this.nodeType?this.textContent:undefined;});
Element.prototype.__defineSetter__('text',function(txt){this.textContent=txt;});
//让firefox文本节点支持text属性
Text.prototype.__defineGetter__('text',function(){return this.textContent===undefined?this.text:this.nodeType?this.textContent:undefined;});
Text.prototype.__defineSetter__('text',function(txt){ this.textContent = txt;});
//serializeToString->xml 只读
Element.prototype.__defineGetter__('xml',function(){return this.nodeType?(new XMLSerializer()).serializeToString(this):null;});
//addEventListener->attachEvent
HTMLElement.prototype.attachEvent = function(ev, fn){
ev = ev.toLowerCase();
this.addEventListener(ev.indexOf('on')===0?ev.substr(2):ev, fn, false);
};
//removeEventListener->detachEvent
HTMLElement.prototype.detachEvent = function(ev, fn){
ev = ev.toLowerCase();
this.removeEventListener(ev.indexOf('on')===0?ev.substr(2):ev,fn);
};
if(self!=top){ //为移动xWin定义事件,document为xWin下的document
var doXwinMv=false; //用于修正移动xWin后其中的文本会被选中的问题
document.addEventListener('mousedown', function(ev){ mouseOffset={x:ev.pageX, y:ev.pageY} });
document.addEventListener('mousemove', function(ev){ top.mouseMove(ev); });
document.addEventListener('mouseup', function(ev){ top.mouseUp(ev);if(window.getSelection() && doXwinMv) window.getSelection().collapseToStart(); doXwinMv=false;});
}
//修正firefox下xWin背景色为黑色的问题
//if(!window.getComputedStyle(document.documentElement,null)['backgroundColor']) document.documentElement.style.backgroundColor = '#fff';
//document.documentElement.style.backgroundColor = '#fff';
//让firefox支持innerText属性
HTMLElement.prototype.__defineGetter__("innerText",function(){
var textRange = this.ownerDocument.createRange();
textRange.selectNodeContents(this);
return textRange.toString().replace(/\t\n/g,'');
});
HTMLElement.prototype.__defineSetter__("innerText",function(str){
this.textContent = str;
});
//修正firefox下firstChild lastChild获取到的是空白行文本节点的问题
Element.prototype.__defineGetter__('firstChild',function(){
var firstEleNode = firstNode = null;
firstNode = this.childNodes[0];
while (firstNode && firstNode.nodeType===3 && firstNode.nodeValue=='\n'){//若是空白行文本节点 则继续往后查找
firstNode = firstNode.nextSibling;
}
firstEleNode = firstNode;
return firstEleNode;
});
Element.prototype.__defineGetter__('lastChild',function(){
var mIdx = this.childNodes.length-1;
var lastNode = lastEleNode =null;
lastNode = this.childNodes[mIdx];
while(lastNode && lastNode.nodeType===3 && lastNode.nodeValue==='\n'){//若是空白行文本节点 继续往前查找
lastNode = lastNode.previousSibling;
}
lastEleNode = lastNode;
return lastEleNode;
});
//后台返回xml文档后，遍历节点会遍历到空白行文本节点 所以需要这个方法先删除空白行文本节点 属性节点也是子节点？？
Element.prototype.__defineGetter__('delEmptyLineNode',function(){ //注意：document文档节点没继承该属性 document.documentElemnt根节点继承了该属性
function delEmpty(node){
var chNodes=node.childNodes, re=/^\s+$|\n|\t/m;
for(var i=0, len=chNodes.length; i<len; i++){
if (chNodes[i] && chNodes[i].nodeType===1){
if(chNodes[i].childNodes.length===1){ //叶子节点
}else{ //非叶子元素节点 递归
delEmpty(chNodes[i]);
}
}else if(chNodes[i] && chNodes[i].nodeType===3 && re.test(chNodes[i].nodeValue)){//空白文本节点
node.removeChild(chNodes[i]);
--i;
}
}
}
delEmpty(this);
return this;
});
//xmlNode.selectNodes()方法 只支持ie, 在当前xml节点下查找节点, Firefox下为Element原型定义同名属性
Element.prototype.selectNodes = function(xpathStr){
if(xpathStr.charAt(0)=='/') xpathStr="."+xpathStr;
var snapshot = this.ownerDocument.evaluate(xpathStr, this, null, 7, null);
var nodes = [];
for(var i=0; i<snapshot.snapshotLength; i++){
nodes.push(snapshot.snapshotItem(i));
}
return nodes;
};
Element.prototype.selectSingleNode = function(xpathStr){
return this.selectNodes(xpathStr)[0];
};
//ie怪异模式下 可以node.children(2)这样获取第3个子节点，firefox或ie9等现代浏览器都不行，firefox修改同名属性children为children()方法来兼容
//注:children重定义后,children[0]这样的写法将不可用
Object.defineProperty(Element.prototype, 'children',{value:function(i){return this.delEmptyLineNode.childNodes[i];}, writable:true, enumerable:true, configurable:true});
//(new DOMParser())).parseFromString(xmlStr, 'text/xml') --> loadXML
XMLDocument.prototype.loadXML = function(xmlStr){
return (new DOMParser()).parseFromString(xmlStr,'text/xml');
};
//让firefox支持insertAdjacentElement
HTMLElement.prototype.insertAdjacentElement = function(sWhere, insEle){
if(!insEle.nodeType) return;
this.insertAdjacentHTML(sWhere,insEle.xml);
};
//让firefox支持ie事件对象的相关属性
//-- returnValue --
Event.prototype.__defineSetter__("returnValue", function(b){
if(!b) this.preventDefault();
return b
});
//-- cancelBubble --
Event.prototype.__defineSetter__("cancelBubble", function(b){
if(b) this.stopPropagation();
return b;
});
//--- srcElement ---
Event.prototype.__defineGetter__("srcElement", function(){
var node = this.target;
while(node.nodeType !== 1) node = node.parentNode;
return node;
});
//--- fromElement ---
Event.prototype.__defineGetter__("fromElement", function(){
var node;
if(this.type == 'mouseover'){ node = this.relatedTarget;}
if(this.type == 'mouseout'){ node = this.target; }
if(!node) return null;
while(node.nodeType!=1){ node = node.parentNode; }
return node;
});
//--- toElement ---
Event.prototype.__defineGetter__("toElement", function(){
var node;
if(this.type == 'mouseover'){ node = this.target; }
if(this.type == 'mouseout' ){ node = this.relatedTarget; }
if(!node) return null;
while(node.nodeType!=1){ node = node.parentNode; }
return node;
});
//让firefox下table支持moveRow方法
HTMLElement.prototype.moveRow = function(srcIdx, targetIdx){
var re = /^(table|tbody|tfoot|thead)/i;
if(!re.test(this.nodeName) || srcIdx === targetIdx) return;
var pNode, srcR,targetR;
pNode = this;
if(this.nodeName.toLowerCase() === 'table') pNode = this.getElementsByTagName('tbody')[0]; //firefox 自动插入tbody
//targetIdx<srcIdx 行往前面移 直接pNode.insertBefore()即可
srcR = pNode.rows[srcIdx];
targetR = pNode.rows[targetIdx];
if(!srcR || !targetR) return; //索引范围以外 则返回
targetRnext = pNode.rows[targetIdx+1] || null;
if(targetIdx < srcIdx) pNode.insertBefore(srcR, targetR);
if(targetIdx > srcIdx) pNode.insertBefore(srcR, targetRnext);
};
//让firefox下的styleSheet对象支持rules属性
CSSStyleSheet.prototype.__defineGetter__('rules', function(){return this.cssRules});
//让firefox支持currentStyle 注意color样式值会转换为 rgb(233,22,22)的形式
HTMLElement.prototype.__defineGetter__('currentStyle',function(){return window.getComputedStyle(this,null);});
//firefox createElementX
HTMLDocument.prototype.createElementX = function (tag){
var re=/^<.+>$/;
if(re.test(tag)){ //<p ...></p> < ...>
try{
var tmpDiv = this.createElement('div'); //临时div
tmpDiv.innerHTML = tag;
return tmpDiv.firstChild;
}catch(err){alert(err.message);}
}else{ // p, div...
try{
return document.createElement(tag);
}catch(e){alert(e.message)}
}
}
}//For Firefox End
