FireFox對XML的處理相容IE的節點處理方法

使Firefox對XML的處理相容IE的節點處理方法。具體代碼列出如下。

具體代碼如下。

<! DOCTYPE Html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
< HTML >
< HEAD >
< TITLE > 讓firefox對xml的處理相容IE的selectSingleNode selectNodes方法 </ TITLE >
< META NAME ="Author" CONTENT ="emu" >
< META NAME ="KeyWords" CONTENT ="firefox IE selectSingleNode selectNodes" >
< META NAME ="Description" CONTENT ="使firefox可以支援selectSingleNode selectNodes方法" >
< SCRIPT LANGUAGE ="javascript" >
<!--
var isIE = !! document.all;

function parseXML(st){
if (isIE){
var result = new ActiveXObject( " microsoft.XMLDOM " );
result.loadXML(st);
} else {
var parser = new DOMParser();
var result = parser.parseFromString(st, " text/xml " );
}
return result;
}

if ( ! isIE){
var ex;
XMLDocument.prototype.__proto__.__defineGetter__( " xml " , function (){
try {
return new XMLSerializer().serializeToString( this );
} catch (ex){
var d = document.createElement( " div " );
d.appendChild( this .cloneNode( true ));
return d.innerHTML;
}
});
Element.prototype.__proto__.__defineGetter__( " xml " , function (){
try {
return new XMLSerializer().serializeToString( this );
} catch (ex){
var d = document.createElement( " div " );
d.appendChild( this .cloneNode( true ));
return d.innerHTML;
}
});
XMLDocument.prototype.__proto__.__defineGetter__( " text " , function (){
return this .firstChild.textContent
});
Element.prototype.__proto__.__defineGetter__( " text " , function (){
return this .textContent
});

XMLDocument.prototype.selectSingleNode = Element.prototype.selectSingleNode = function (XPath){
var x = this .selectNodes(xpath)
if ( ! x x.length < 1 ) return null ;
return x[ 0 ];
}
XMLDocument.prototype.selectNodes = Element.prototype.selectNodes = function (xpath){
var xpe = new XPathEvaluator();
var nsResolver = xpe.createNSResolver( this .ownerDocument == null ?
this .documentElement : this .ownerDocument.documentElement);
var result = xpe.evaluate(xpath, this , nsResolver, 0 , null );
var found = [];
var res;
while (res = result.iterateNext())
found.push(res);
return found;
}
}
var x = parseXML( " <people> <person first-name= " eric " middle-initial= " H " last-name= " jung " > <address street= " 321 south st " city= " denver " state= " co " country= " usa " /> <address street= " 123 main st " city= " arlington " state= " ma " country= " usa " /> </person> <person first-name= " jed " last-name= " brown " > <address street= " 321 north st " city= " atlanta " state= " ga " country= " usa " /> <address street= " 123 west st " city= " seattle " state= " wa " country= " usa " /> <address street= " 321 south avenue " city= " denver " state= " co " country= " usa " /> </person></people> " );

alert( " 搜尋所有人的姓氏（last-name） " )
var results = x.selectNodes( " //person/@last-name " );
for ( var i = 0 ; i < results.length;i ++ )
alert( " Person # " + i + " has the last name " + results[i].nodeValue);
alert( " 搜尋第二個人" );
// IE是以0為下標基數的，而不是1
if ( ! document.all)
results = x.selectSingleNode( " /people/person[2] " );
else
results = x.selectSingleNode( " /people/person[1] " );
alert(results.xml)

alert( " 取得住址在donver街上的人" );
results = x.selectNodes( " //person[address/@city='denver'] " );
for ( var i = 0 ; i < results.length;i ++ )alert(results[i].xml)

if ( ! document.all){
// 取得所有街名中帶south的地址
results = x.selectNodes( " //address[contains(@street, 'south')] " );
alert(results[ 0 ].xml);
} else {
alert( " IE不支援//address[contains(@street, 'south')] 這種查詢方式" )
}
// -->
</ SCRIPT >
</ HEAD >
< BODY >
</ BODY >
</ HTML >

範例引自http://kb.mozillazine.org/XPath 。從例子可以看到，IE對xpath的支援還是有限制的。