XPATH eksempel

// the wines we want
var selectionXPathF=
   '//wine[country="Frankrike" and type="red" and volume = "75"]';
var selectionXPathI=
   '//wine[country="Italia" and type="red" and volume = "75"]';
// datatable when loaded and prepared
var dataTable=null;

function drawChart(element) {
    if(!dataTable){
        document.getElementById(element).innerHTML="no data loaded";
        return;
    }
    var data = new google.visualization.DataTable();
    data.addColumn('string', 'Terningkast');
    data.addColumn('number', 'snitt');
    data.addRows(dataTable);
    // Chart options
    var options = 
    {'title':'Gjennomsnittspris pr flaske fordelt på terningkast',
      'width':500,'height':300
    };
    
    var chartBar = 
        new google.visualization.BarChart(document.getElementById(element));
    chartBar.draw(data, options);
}
function getAndShowWinePrices(path, element){
$.ajax({
    url:'viner.xml',
    // want load to finnish before drawing
    async:false,
    success:function(data,status,xhr)
    {
        var XMLDom=xhr.responseXML;
        var nodes=XMLDom.evaluate(path, XMLDom, null, 
                  XPathResult.ANY_TYPE, null);
        var result=nodes.iterateNext();
        var sum = [0,0,0,0,0,0];
        var count= [0,0,0,0,0,0];
        while(result){
            var dice=parseInt(
                     result.getElementsByTagName("dice")[0].
                     firstChild.nodeValue);
            count[dice-1]+=1;
            var price=parseFloat(
                     result.getElementsByTagName("price")[0].
                     firstChild.nodeValue);
            sum[dice-1]+=price;
            result=nodes.iterateNext();
        }            
        // prepare the datatable for the chart
        dataTable=[];
        for(var ix=0; ix < 6; ix++){
            var p=sum[ix]/count[ix];
            dataTable.push([""+(ix+1),p]);
            //dataTable.push([ix+1,p.toFixed(0)]);
        }
        //draw the chart
        drawChart(element);
    },
    error:function(data)
    {
        document.getElementById(Element).innerHTML=
          "error when loading";
    }
    });
}
// Load the Visualization API and the basic chart package.
google.load('visualization', '1.0', {'packages':['corechart']});
// Set a callback to run when the Google Visualization API is loaded.
google.setOnLoadCallback(drawChart);