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Web 2.0 技术储备............

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<!--
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 ){ // 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
    /*
                                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>
posted on 2006-10-28 00:07 Web 2.0 技术资源 阅读(252) 评论(0)  编辑  收藏

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