FireFox对XML的处理兼容IE的节点处理方法

王朝other·作者佚名  2008-05-31
窄屏简体版  字體: |||超大  

使Firefox对XML的处理兼容IE的节点处理方法。具体代码列出如下。

具体代码如下。

<! DOCTYPE Html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >

< HTML >

< HEAD >

< TITLE > 使firefox对xml的处理兼容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可以支持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( " 搜索所有人的姓氏(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( " 搜索第二个人 " );

// IE是以0为下标基数的,而不是1

if ( ! document.all)

results = x.selectSingleNode( " /people/person[2] " );

else

results = x.selectSingleNode( " /people/person[1] " );

alert(results.xml)

alert( " 获得住址在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){

// 获得所有街名中带south的地址

results = x.selectNodes( " //address[contains(@street, 'south')] " );

alert(results[ 0 ].xml);

} else {

alert( " IE不支持 //address[contains(@street, 'south')] 这种查询方式 " )

}

// -->

</ SCRIPT >

</ HEAD >

< BODY >

</ BODY >

</ HTML >

例子引自 http://kb.mozillazine.org/XPath 。从例子可以看到,IE对xpath的支持还是有限度的。

 
 
 
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