IOS ajax动态获取select数据问题

问题: ios 使用ajax动态加载select的数据时,弹出的数据是旧的option数据,不是当次加载的最新数据(感觉ajax和select行为并行的),

解决办法: 先让select失去焦点不弹出option选项,等ajax加载完数据后再让它获取焦点弹出最新加载的数据.

<select name="jsUser" id="_jsUser_'+order.orderId+'" onblur="blurFunction()" onfocus="findJsUser('+order.orderId+')" class="select-category" style="width:75px;"><option value="">请选择</option></select>

var flag = false;
function blurFunction(){
    if(flag){
    	flag = false;
    }
}
function findJsUser(orderId){
    if(!flag){
    	$("#_jsUser_"+orderId).blur();
    }
    if(!flag){
	    $.ajax({
	        url: "findJsUser",
	        type: "POST",
	        async: false,
	        dataType: "json",
	        data: {orderId: orderId},
	        success:function(data){
		        $("#_jsUser_"+orderId).empty();
		        $("#_jsUser_"+orderId).append("<option value=''>请选择</option>");
		        $.each(data, function(i,t){
		        	$("#_jsUser_"+orderId).append("<option value='"+t.id+"' >"+t.nickName+"</option>");
		        });
		        if(!flag){
			        flag = true;
			        $("#_jsUser_"+orderId).focus();
		        }
	        },
	        error:function(e){
	        	alert("失败,请稍后重试!");
	        }
	    });
    }
}