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=""; 
} 
});