function getQuery() {
  //location.search是从当前URL的?号开始的字符串 ,截取并解决乱码
  var flag = decodeURI(window.location.search.substr(1));
  var obj = {}, arr = flag ? (flag.split('&') || []) : []
  arr.forEach(function (v) {
    var newArr = v.split('=');
    obj[newArr[0]] = newArr[1]
  });
  return obj
}