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我想加载一个谷歌带注释的图表使用玉，但无法获得图表呈现。我能够得到一个饼图加载，但不能加载需要显式指定容器元素大小的图表时。在谷歌加载谷歌图表
从谷歌 http://code.google.com/apis/chart/interactive/docs/gallery/annotatedtimeline.html
的例子翻译成玉（我的代码）
head
script(src='http://www.google.com/jsapi')
script
google.load('visualization', '1', {'packages':['annotatedtimeline']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('date', 'Date');
data.addColumn('number', 'Sold Pencils');
data.addColumn('string', 'title1');
data.addColumn('string', 'text1');
data.addColumn('number', 'Sold Pens');
data.addColumn('string', 'title2');
data.addColumn('string', 'text2');
data.addRows([
[new Date(2008, 1 ,1), 30000, undefined, undefined, 40645, undefined, undefined],
[new Date(2008, 1 ,2), 14045, undefined, undefined, 20374, undefined, undefined],
[new Date(2008, 1 ,3), 55022, undefined, undefined, 50766, undefined, undefined],
[new Date(2008, 1 ,4), 75284, undefined, undefined, 14334, 'Out of Stock','Ran out of stock on pens at 4pm'],
[new Date(2008, 1 ,5), 41476, 'Bought Pens','Bought 200k pens', 66467, undefined, undefined],
[new Date(2008, 1 ,6), 33322, undefined, undefined, 39463, undefined, undefined]
]);
}
var chart = new google.visualization.AnnotatedTimeLine(document.getElementById('chart_div'));
chart.draw(data, {displayAnnotations: true});
body
a(href='/') Index
p
#chart_div
*和我的CSS（通快递layout.jade文件加载，请注意chart_div负荷蓝色背景） *
body {
padding: 50px;
font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
}
a {
color: #00B7FF;
}
#chart_div {
background-color: #00B7FF;
width: 700px;
height: 240px;
}