<div class="am-u-lg-2">账  户</div>
               <div class="am-u-lg-10"><input type="text" name="account" id="" value="" class="am-form-field am-input-sm"/></div>
               <div class="fromjg"></div>
               <div class="am-u-lg-2">确认账户</div>
               <div class="am-u-lg-10"><input type="text" name="is_account" id="is_account" value="" class="am-form-field am-input-sm"/></div>


$("#is_account").bind("input propertychange",function(){
   if($("input[name=account]").val() == $(this).val()){
    $("#submit").removeAttr("disabled"); 
   }else{
    alert("两次账户不同")
   }
   
  });