我正在做的是在用戶單擊按鈕時顯示圖表。該圖表正在使用JavaScript從PHP文件中提取。這是我實際在做的代碼。Google圖表API不顯示使用javascript/ajax的圖表
這是JavaScript函數獲取圖形並將其附加到HTML DOM
function draw_graph(num) {
var xmlhttp;
if (window.XMLHttpRequest) { // code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
} else { // code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState==4 && xmlhttp.status==200) {
var output = xmlhttp.responseText;
document.getElementById('script_content').innerHTML = output;
}
}
xmlhttp.open("GET","includes/getgraphdata.php?type="+num+"&mode=day",true);
xmlhttp.send();
}
這是PHP代碼,我想畫一個簡單的圖形虛擬數據
<?php
echo "
<script type=\"text/javascript\" src=\"https://www.google.com/jsapi\"></script>
<script type=\"text/javascript\">
google.load('visualization', '1', {packages:['corechart']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Date');
data.addColumn('number', 'Sell');
data.addColumn('number', 'Purchase');
data.addRows([
['12-03-2012', 150, 300],
['12-04-2012', 250, 500]
]);
var options = {
title: 'Graph'
};
var chart = new google.visualization.LineChart.(document.getElementById('temp'));
chart.draw(data, options);
}
</script>
";
的上面的代碼與HTML DOM正確連接,但圖形不顯示。