<form>
  <input name="zhai"/><!-- 三个相同name的input -->
  <input name="zhai"/>
  <input name="zhai"/>
 </form>

 if ($.validator) {
   $.validator.prototype.elements = function () {
    var validator = this,
     rulesCache = {};
    return $(this.currentForm)
    .find("input, select, textarea")
    .not(":submit, :reset, :image, [disabled]")
    .not(this.settings.ignore)
    .filter(function () {
     if (!this.name && validator.settings.debug && window.console) {
      console.error("%o has no name assigned", this);
     }
     rulesCache[this.name] = true;
     return true;
    });
   }
  }

elements: function() {
   var validator = this,
    rulesCache = {};
   // select all valid inputs inside the form (no submit or reset buttons)
   return $(this.currentForm)
   .find("input, select, textarea")
   .not(":submit, :reset, :image, [disabled]")
   .not( this.settings.ignore )
   .filter(function() {
    if ( !this.name && validator.settings.debug && window.console ) {
     console.error( "%o has no name assigned", this);
    }
    // 注释掉这里
    // select only the first element for each name, and only those with rules specified
    //if ( this.name in rulesCache || !validator.objectLength($(this).rules()) ) {
    // return false;
    //} 
    rulesCache[this.name] = true;
    return true;
   });
  },

 return !this.name && b.settings.debug && window.console && console.error("%o has no name assigned", this),
//this.name in c || !b.objectLength(a(this).rules()) ? !1 : (c[this.name] = !0, !0)//注释这行
c[this.name] = !0, !0 //添加这行