Javascript 无法获取未定义或空引用的属性
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Unable to get property of undefined or null reference
提问by bnorton
This is similar to my last question but the problem is different. I use a separate javascript file for all of my javascript functions. That file is called by my main window, and is also called in a separate instance by my child windows. My code works with every browser except IE 9 and 10. I have not tested earlier versions of IE.
这与我的最后一个问题类似，但问题不同。我为所有 javascript 函数使用单独的 javascript 文件。该文件由我的主窗口调用，也由我的子窗口在单独的实例中调用。我的代码适用于除 IE 9 和 10 之外的所有浏览器。我没有测试过早期版本的 IE。
IE says the offending line is window.opener.savetoparent($targetval);My previous code was opener.savetoparent($targetval);and before that I simply made the changes to the parent from the child directly. I have also gone into IE and enabled protected mode as suggested in another article with no change in behavior. Savetoparent()is available to both the child and the parent so I must call it with opener for it to run in the parent.
IE 说违规行是window.opener.savetoparent($targetval);我以前的代码opener.savetoparent($targetval);，在此之前，我只是直接从子项对父项进行了更改。我也进入了 IE 并按照另一篇文章中的建议启用了保护模式，行为没有改变。 Savetoparent()对孩子和父母都可用，所以我必须用 opener 调用它才能在父母中运行。
The error I am getting is : Unable to get property 'savetoparent' of undefined or null reference.Here is the code:
我得到的错误是：Unable to get property 'savetoparent' of undefined or null reference.这是代码：
function saveandclose($wintype, $propid) {
switch($wintype) {
case 'ccdetail':
var $targetval = $('#cc-total').val();
var $fieldname = 'closingcoststotal';
break;
}
window.opener.savetoparent($targetval);
closewindow();
}
The safe to parent function is:
对父函数的安全是：
function savetoparent($targetval) {
$('#' + $parentloc).val($targetval);
var $name = $('#' + $parentloc).attr("name");
var $rawtargetval = jsstrtonum($targetval);
processrvsave($propertyid, $name, $rawtargetval);
calcrvtotals();
}
Any light you can shed on this would be greatly appreciated.
您可以对此提供任何启发，我们将不胜感激。
window is launched like this
窗口是这样启动的
if(window.showModalDialog) {
window.showModalDialog($childname + '.php?ploc=' + $parentloc + '&propid=' + $propid, '', 'dialogWidth: ' + $winwidth + 'px; dialogHeight: ' + $winheight + 'px;')
}
else {
window.open($childname + '.php?ploc=' + $parentloc + '&propid=' + $propid, '', 'width=' + $winwidth + ', height=' + $winheight + ', modal=yes');
}
采纳答案by mplungjan
There is no opener in showModalDialog. Use the returnValue
showModalDialog 中没有开启器。使用返回值
Also there has not been a modal parameter on window.open in many years..
多年来，window.open 上也没有模态参数。
Here is how to use returnValue
这是如何使用 returnValue
if(window.showModalDialog) {
$targetval = window.showModalDialog($childname + '.php?ploc=' + $parentloc + '&propid=' + $propid,
window,
'dialogWidth: ' + $winwidth + 'px; dialogHeight: ' + $winheight + 'px;'))
if(targetval) savetoparent($targetval);
}
else {
window.open($childname + '.php?ploc=' + $parentloc + '&propid=' + $propid, '', 'width=' + $winwidth + ', height=' + $winheight + ', modal=yes');
}
then
然后
function saveandclose($wintype, $propid) {
var $targetval ="";
switch($wintype) {
case 'ccdetail':
$targetval = $('#cc-total').val();
// var $fieldname = 'closingcoststotal'; I do not see this used anywhere
break;
}
if (window.opener) window.opener.savetoparent($targetval);
else returnValue = $targetval;
closewindow();
}
