JavaScript非同步擷取資料解析

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 <script type="text/javascript">
    var xhr=false;
    function createXhr() {
    var xhobj = false;
    try {
        xhobj = new ActiveXObject("Msxml2.XMLHTTP"); // ie msxml3.0+
    } catch (e) {
        try {
            xhobj = new ActiveXObject("Microsoft.XMLHTTP"); //ie msxml2.6
        } catch (e2) {
            xhobj = false;
        }
    }
    if (!xhobj && typeof XMLHttpRequest != ‘undefined‘) {// Firefox, Opera 8.0+, Safari
        xhobj = new XMLHttpRequest();
    }
    return xhobj;
}
     
    function doDel(du,ot,id){
    //當執行刪除時候建立非同步對象
    xhr=createXhr();
        if(confirm("您確定要刪除此地址嗎？")){
            //設定非同步請求的參數(傳值方式類型,du--default是否預設&ot--ordertype賬戶類型&aid地址編號,是否執行非同步)
            xhr.open(‘get‘,‘DoDelAdd.ashx?Du=‘+du+‘&Ot=‘+ot+‘&aid=‘+id,true);
            //清除緩衝(設定get請求不用緩衝)
            xhr.setRequestHeader("If-Modified-Since","0");
            //設定回呼函數
            xhr.onreadystatechange=function(){
                //檢查準備狀態 0--未初始化，1--載入，2--載入完成，3-正在互動，4--完成互動
                if(xhr.readyState==4){
                    //通訊成功
                    if(xhr.status==200){
                        //獲得傳回值
                        var res=xhr.responseText;
                        //判斷
                        if(res=="OK"){
                            //擷取要刪除行的id
                            var nowtr=document.getElementById("mrdz1"+id);
                            nowtr.parentNode.removeChild(nowtr);
                        }
                    }
                }
            }
            xhr.send(null);
        }
    }
    </script>

JavaScript非同步擷取資料解析