Ajax method to synchronously verify whether the order number exists

This article mainly introduces the method of ajax synchronous verification of the existence of the order number, involving the operation skills related to data interaction based on ajax. Friends in need can refer to it

The example of this article tells the ajax synchronization verification of the order number method exists. Share it with everyone for your reference, the details are as follows:

//保存前执行的方法,ajax同步调用后台验证包裹单号是否存在
function doBeforeSave(){
  var packageCode=document.getElementById("packageCode").Value;
  var temp=false;
  if(packageCode!=""){
    $.ajax({
     url: "${ctx}/finance/packageManagement!parcelsWhetherExists.do", //接收页面
     type: 'post',  //POST方式发送数据
     async: false,  //ajax同步
     data:{packageCode:packageCode},
     success: function(result) {
      temp = eval(result.result);
     }
    });
  }
  if(!temp){
   alert("包裹单号已存在！");
   toft.resetForm("addDataForm");//清空表单
   toft.id("packageCode").focus();
  }
  return temp;
}

The above is what I compiled for everyone, I hope it will be helpful to everyone in the future.

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