salesforce apex + vf page + Google Chart

global with sharing class YUT_GoogleChartsController {
@RemoteAction
global static Opportunity[] loadOpps() {
return [select Id, Name, ExpectedRevenue, Amount from Opportunity order by CreatedDate DESC limit 10];
}
}

<apex:page controller="YUT_GoogleChartsController" sidebar="false">
<!-- Google API inclusion -->
<apex:includeScript id="a" value="https://www.google.com/jsapi" />

<apex:sectionHeader title="Google Charts + Javascript Remoting" subtitle="Demoing - Opportunities by Exepected Revenue"/>

<!-- Google Charts will be drawn in this DIV -->
<div id="chartBlock" />

<script type="text/javascript">
// Load the Visualization API and the piechart package.
google.load('visualization', '1.0', {'packages':['corechart']});

// Set a callback to run when the Google Visualization API is loaded.
google.setOnLoadCallback(initCharts);

function initCharts() {
// Following the usual Remoting syntax
// [<namespace>.]<controller>.<method>([params...,] <callbackFunction>(result, event) {...}
// controller : GoogleChartsController
// method : loadOpps
YUT_GoogleChartsController.loadOpps(
function(result, event){
// load Column chart
var visualization = new google.visualization.ColumnChart(document.getElementById('chartBlock'));
// Prepare table model for chart with columns
var data = new google.visualization.DataTable();
data.addColumn('string', 'Opportunity');
data.addColumn('number', 'Expected Revenue');
data.addColumn('number', 'Amount');
// add rows from the remoting results
for(var i =0; i<result.length;i++){
var r = result[i];
data.addRow([r.Name, r.ExpectedRevenue, r.Amount]);
}
// all done, lets draw the chart with some options to make it look nice.
visualization.draw(data, {legend : {position: 'top', textStyle: {color: 'blue', fontSize: 10}}, width:window.innerWidth,vAxis:{textStyle:{fontSize: 10}},hAxis:{textStyle:{fontSize: 10},showTextEvery:1,slantedText:false}});
}, {escape:true});
}
</script>
</apex:page>