Hi, this is my index.php
<html>
<head>
<meta charset="UTF-8">
<title>Prova</title>
<!--Load the AJAX API-->
<script type="text/javascript"
src="https://www.google.com/jsapi";></script>
<script type="text/javascript"
src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
// Load the Visualization API and the piechart package.
google.load('visualization', '1', {'packages':['corechart']});
// Set a callback to run when the Google Visualization API is loaded.
google.setOnLoadCallback(drawChart);
function drawChart(num) {
var json = $.ajax({
url: "prova.php",
data: "q="+num,
dataType:"json",
async: false
}).responseText;
// Create our data table out of JSON data loaded from server.
var datachart = new google.visualization.DataTable(json);
var options = {
is3D: 'true',
width: 800,
height: 600
};
var chart = new
google.visualization.PieChart(document.getElementById('chart_div'));
chart.draw(datachart,options);}
</script>
<form>
<select name="Parametr" onchange="drawChart(this.value)">
<option value="">Select a Parameter:</option>
<option value="Param1">Parametr1</option>
<option value="Param2">Parametr2</option>
<option value="Param3">Parametr3</option>
</select>
<select name="Sistem" >
<option value="">Select a Component:</option>
<option value="comp1">Component1</option>
<option value="comp2">Component2</option>
<option value="comp3">Component3</option>
</select>
</form>
</head>
<body>
<div id="chart_div" style="width: 500px; height: 500px;"></div>
</body>
</html>
Now my question is how do I pass two values to the function drawChart???
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