下面以一个环形图为例，现在想做的效果是图例初始化时默认显示第一个图的文字，上代码
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<script type="text/javascript" src="js/echarts.js" ></script>
</head>
<body>
<div></div>
<script type="text/javascript">
var myChart = echarts.init(document.getElementById(main));
var ass = {
normal: {
show: false,
position: center,
textStyle: {
fontSize : 30,
fontWeight: old
}
