- TypeErrorUnable to set property 'value' of undefined or null reference.
但是可以进入添加页面，填完信息后，submit后跳转至 错误页面，（Unknown system error)
参考解决方案：
http://*.com/questions/21775185/error-unable-to-set-property-value-of-undefined-or-null-reference
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError
最终是因为：替换之后name要换成id.
<%--var hidden = document.createElement("<input type='hidden' name='<%=myid>'>");--%>
var hidden=document.createElement("input");
hidden.setAttribute("type","hidden");
hidden.setAttribute("id","myid");
obj.appendChild(hidden);
-
Unable to get property 'substring' of undefined or null reference
解决： document.getElementsByName("startDate").value != '' && document.getElementsByName("endDate").value != '';
后面要加下标，如getElementsByName("")[0].value；
Unable to get property 'style' of undefined or null reference
解决：document.getElementById.iframe1.style.display='none';
- Unable to set property 'disabled' of undefined or null reference
解决：document.form1.birthDayStr.disabled= true;
PS. <form name="form1"
- 系统中在升级前就存在的document.getElementById()，某些在IE11中并不支持
IF :
form1.actionType.value = "searchResult";
THEN:
var form1 = document.getElementsByName("form1")[0];
Other points Similar
- onclick()内的函数报_submitQuery is undefined
function _submitQuery(){
if(!_checkQuery()){
alert("-----");
}
return
}
原因：_checkQuery()内的一个getElementsByName的一个下标为[],未加0;
- 报Function expected
原因：IE11不支持【document.frames("pendingActivities")】用法。
function doRediary(){
var radios=doucment.frames("pendingActivities").document.getElemntsByName("selectedActivities");
}
替换为：
function doRediary(){
var radios=doucment.frames["pendingActivities"].document.getElemntsByName("selectedActivities");
}
技术来源：blog.sina.com.cn/s/blog_74924f2401017t0a.html
- dispatchEvent-onchange,onmousedown,onblur,onclick适应IE11写法。
var event1 = document.createEvent('HTMLEvents');
event1.initEvent("change", true, true);
obj.dispatchEvent(event1);
var event1 = document.createEvent("MouseEvents");
event1.initMouseEvent("mousedown", true, true, window,0, 0, 0, 0, 0, false, false, false, false, 0, null);
document.body.dispatchEvent(event1);
var evt2 = document.createEvent("MouseEvent");
evt2.initMouseEvent("blur", true, true, window,0, 0, 0, 0, 0, false, false, false, false, 0, null);
document.body.dispatchEvent(evt2);
var evt2 = document.createEvent("MouseEvent");
evt2.initMouseEvent("click", true, true, window,0, 0, 0, 0, 0, false, false, false, false, 0, null);
document.body.dispatchEvent(evt2);
- style属性
不支持这种写法：
style='display: "none"'
支持下面写法：
style="display: none"
持续更新；