var minarr = [];
var arr = _g().getWidgetsByName("p1");//获取扩展单选按钮组p1的控件对象数组
if (arr[0] != undefined) {
for (var i = 0; i < arr.length; i++) {
minarr.push(arr[i].getValue());
}
} else {
minarr.push(arr.getValue());
}
var minValue = Math.min(...minarr);
alert(minValue)