<foreach name="datalist" item="vo">
{value: {$vo.count},name:'{$vo.type}'},
</foreach>
type能正常解析，可count却不能。改成如下多行后，解析正常。呵呵！
<foreach name="datalist" item="vo">
{
value: {$vo.count},
name:'{$vo.type}'
},
</foreach>