function fireKeyEvent(el, evtType, keyCode) {            var evtObj;            if (document.createEvent) {                if (window.KeyEvent) {
   //firefox 浏览器下模拟事件                    evtObj = document.createEvent('KeyEvents');                    evtObj.initKeyEvent(evtType, true, true, window, true, false, false, false, keyCode, 0);                } else {
   //chrome 浏览器下模拟事件                    evtObj = document.createEvent('UIEvents');                    evtObj.initUIEvent(evtType, true, true, window, 1);                    delete evtObj.keyCode;                    if (typeof evtObj.keyCode === "undefined") {
   //为了模拟keycode                        Object.defineProperty(evtObj, "keyCode", { value: keyCode });                                           } else {                        evtObj.key = String.fromCharCode(keyCode);                    }                    if (typeof evtObj.ctrlKey === 'undefined') {
   //为了模拟ctrl键                        Object.defineProperty(evtObj, "ctrlKey", { value: true });                    } else {                        evtObj.ctrlKey = true;                    }                }                el.dispatchEvent(evtObj);            } else if (document.createEventObject) {
   //IE 浏览器下模拟事件                evtObj = document.createEventObject();                evtObj.keyCode = keyCode                el.fireEvent('on' + evtType, evtObj);            }        }                var testPassword = "181818";        var tp;        var cCode;        var testss = document.getElementById("input_txt_50531_740884");        for(var i=0;i