如何在highcharts中获取ay轴的最大值？
即http://jsfiddle.net/gh/get/jquery/1.7.2/highslide-software/highcharts.com/tree/master/samples/highcharts/demo/line-basic/这里最大值为30.如果禁用纽约和东京则为20,依此类推.
有任何想法吗？
javascript jquery highcharts
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