ajax同步异步简单实现

$("#btn_savefwsb").click(function(){
var obj=checkdata(arr);
if(obj.flag==true){
hideadddiv();
$.ajax({
type : "post",
url : "/vts/doinsertfwzt.do",
async: false ,//ajax同步
data : "ip="+obj.ip+"&port="+obj.port+"&lx="+obj.lx+"&fwq="+obj.fwq+"&connip="+obj.connip+"&direct="+obj.direct,
success : function(data) {
if (data.success == false) {
alert(data.msg);
} else {
}
}
});
}else{
alert(obj.msg);
obj.msg="";
}
});