判断ifame 是否加载成功

 有的时候，需要临时判断是否加载成功和成功以后的操作。

 

    var ifame = document.getElementById("mapHostel");
            if (ifame.attachEvent) {
                ifame.attachEvent("onreadystatechange", function () {
                    if (ifame.readyState === "complete" || ifame.readyState == "loaded") {
                        alert("Local iframe is now loaded.");
                        ifame.detachEvent("onreadystatechange", arguments.callee);

                    }

                });
            } else {
                ifame.onload = function () {
                    alert("Local iframe is now loaded.");
                };
            }
            ifame.src = "/map/hostelMap.html";