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< 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 >