var str = "nininihaoa";
 var o = {};
 for (var i = 0, length = str.length; i < length; i++) {
  var char = str.charAt(i);
  if (o[char]) {
   o[char]++; //次数加1
  } else {
   o[char] = 1; //若第一次出现，次数记为1
  }
 }
 console.log(o); //输出的是完整的对象，记录着每一个字符及其出现的次数
 //遍历对象，找到出现次数最多的字符的次数
 var max = 0;
 for (var key in o) {
  if (max < o[key]) {
   max = o[key]; //max始终储存次数最大的那个
  }
 }
 for (var key in o) {
  if (o[key] == max) {
   //console.log(key);
   console.log("最多的字符是" + key);
   console.log("出现的次数是" + max);
  }
 } 

entry_name1.indexOf(entry_name)!='-1'

function countInstances(mainStr, subStr)
  {
    var count = 0;
    var offset = 0;
    do
    {
      offset = mainStr.indexOf(subStr, offset);
      if(offset != -1)
      {
        count++;
        offset += subStr.length;
      }
    }while(offset != -1)
    return count;
  }