↑
Main Page

XPath Support in Browsers

this.parseError.url = RegExp.$2;

this.parseError.line = parseInt(RegExp.$3);

this.parseError.linepos = parseInt(RegExp.$4);

this.parseError.srcText = RegExp.$5;

}

};

Document.prototype.loadXML = function (sXml) {

this.__initError__();

this.__changeReadyState__(1);

var oParser = new DOMParser();

var oXmlDom = oParser.parseFromString(sXml, “text/xml”);

while (this.firstChild) {

this.removeChild(this.firstChild);

}

for (var i=0; i < oXmlDom.childNodes.length; i++) {

var oNewNode = this.importNode(oXmlDom.childNodes[i], true);

this.appendChild(oNewNode);

}

this.__checkForErrors__();

this.__changeReadyState__(4);

};

Document.prototype.__load__ = Document.prototype.load;

Document.prototype.load = function (sURL) {

this.__initError__();

this.__changeReadyState__(1);

this.__load__(sURL);

};

Node.prototype.__defineGetter__(“xml”, function () {

var oSerializer = new XMLSerializer();

return oSerializer.serializeToString(this, “text/xml”);

});

}

XPath Support in Browsers

Because XML was being used for so many kinds of data, it became necessary to create a means to locate

data inside of XML code. The answer to this problem is XPath, which is a small language used specifi-

cally to locate a single node or multiple nodes that match a particular pattern. Although an in-depth dis-

cussion of XPath is beyond the scope of this book, a brief introduction is in order.

465

XML in JavaScript

18_579088 ch15.qxd 3/28/05 11:42 AM Page 465