                        课程
                    
                        /前端开发
                        
                            /JavaScript
                        
                        /Echarts3.0入门基础与实战

问题出在那里？没有提示错误信息

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>饼图示例</title>
    <script src="echarts.min.js"></script>
</head>
<body>
<div id="main" style="width: 900px;height: 600px;"></div>
<script type="text/javascript">
 //基于准备好的dom，初始化echarts实例
 var myChart = echarts.init(document.getElementById('main'));
 //指定图表的配置项和数据
 var option={
        title:{
            text:'某站点用户访问来源',
 subtext:'纯属虚构',
 x:'center'
 },tooltip:{
        trigger:'item',
 formatter:"{a}<br/>{b}:{c}({d}%)"
 },legend:{
            orient:'vertical',
 left:'left',
 data:['直接访问',"邮件营销","联盟广告","视频广告","搜索引擎"]
        },
 series:[{
            name:'访问来源',
 type:'pie',
 radius:'55%',
 center:['50%',"60%"],
 data:[
                {value:335,name:'直接访问'},
 {value:310,name:'邮件营销'},
 {value:234,name:'联盟广告'},
 {value:135,name:'视频广告'},
 {value:1548,name:'搜索引擎'}
            ],
 itemStyle:{
                emphasis:{
                    shadowBlur:10,
 shadowOffsetX:0,
 shadowColor:'rgba(0,0,0,0.5)'
 }
            }
        }]
    };
</script>
</body>
</html>