My code is the following.... the output of the php file is a json string.
it works when I reload the page. but I want to change the chart dynamically
each time i press the button. Although the page source shows the updated
information, the alert box will show me the old data. What am I missing?
<script type="text/javascript">
var data, options, chart;
google.load("visualization", "1", {packages:["corechart"]});
function drawChart() {
var jsonData = eval ( '<?php include 'datajson.php' ?>') ;
var data = new google.visualization.DataTable();
data.addColumn('string', 'A');
data.addColumn('number', 'B');
data.addColumn('number', 'C');
data.addColumn('number', 'D');
data.addColumn('number', 'E');
for (var i=0; i < jsonData.length; i++) {
data.addRow([jsonData[i].A,parseInt(jsonData[i].B),
parseFloat(jsonData[i].C),
parseInt(jsonData[i].D), parseFloat(jsonData[i].E)]);
};
alert(jsonData[1].A);
var options = {
title: 'abc',
bubble: {textStyle: {fontSize: 11}},
colorAxis: {colors: ['F7FDFA', 'FFD0D4']}
};
var chart = new
google.visualization.BubbleChart(document.getElementById('chart_div'));
chart.draw(data, options);
};
</script>
<body>
<div id="chart_div" style="width: 900px; height: 450px;"></div>
*<input type="button" value="draw" onclick="drawChart()">*
</body>
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