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Detect when an image fails to load in Javascript
....onerror=imageNotFound;
tester.src=URL;
}
function imageFound() {
alert('That image is found and loaded');
}
function imageNotFound() {
alert('That image was not found.');
}
testImage("http://foo.com/bar.jpg");
And my sympathies for the jQuery-resistant boss!
...
Calling dynamic function with dynamic number of parameters [duplicate]
...). The use of call on mainfunc would also work:-
function target(a) {
alert(a)
}
var o = {
suffix: " World",
target: function(s) { alert(s + this.suffix); }
};
mainfunc("target", "Hello");
mainfunc.call(o, "target", "Hello");
...
Commonly accepted best practices around code organization in JavaScript [closed]
...e is a class called DimScreen. (Assume this dims the screen and pops up an alert box.) It needs a div element that it can enlarge to cover the screen, and then add an alert box, so I pass in a jQuery object. jQuery has a plug-in concept, but it seemed limiting (e.g. instances are not persistent and ...
Google Tag Manager 入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...判断脚本，测试也是个问题，有可能需要先发布，然后：alert或 console.log来辅助测试。
Step 4：
半年以后，我们的网站分析人员或成为了代码编写高手，或每天继续被这些常见的问题困扰，大大影响了本职分析工作的展开，那么...
Get index of element as child relative to parent
...rd li").click(function () {
var index = $("ul#wizard li").index(this);
alert("index is: " + index)
});
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.keyCode vs. .which
...', function(event,handler){
switch(handler.key){
case "ctrl+a":alert('you pressed ctrl+a!');break;
case "ctrl+b":alert('you pressed ctrl+b!');break;
case "r":alert('you pressed r!');break;
case "f":alert('you pressed f!');break;
}
});
hotkeys understands the...
How to get the CPU Usage in C#?
... little more than was requsted but I use the extra timer code to track and alert if CPU usage is 90% or higher for a sustained period of 1 minute or longer.
public class Form1
{
int totalHits = 0;
public object getCPUCounter()
{
PerformanceCounter cpuCounter = new Performance...
Can I find events bound on an element with jQuery?
.../ Bind up a couple of event handlers
$("#foo").on({
click: function(){ alert("Hello") },
mouseout: function(){ alert("World") }
});
// Lookup events for this particular Element
$._data( $("#foo")[0], "events" );
The result from $._data will be an object that contains both of the events we...
How to check file input size with jQuery?
...hange', function() {
//this.files[0].size gets the size of your file.
alert(this.files[0].size);
});
As it is a part of the HTML5 specification, it will only work for modern browsers (v10 required for IE) and I added here more details and links about other file information you should know: h...
Set initial focus in an Android application
...
I was able to gain focus on an AlertDialog and enabling focusableintouchmode helped me get it right. Essentially, here's how: alert.show(); alert.getButton(AlertDialog.BUTTON_POSITIVE).setFocusableInTouchMode(true);alert.getButton(AlertDialog.BUTTON_NEGATI...